Does anybody know the song inside of this series.It was Louis and Jessica's fav. song ?
It starts off with "I'm a big big girl in a big bi world...."

It was a Swedish girl that sang it I think, but I dont remember her name

i forgot about the song i think it the big big world or something else.. well good luck on finding it!!

Yeah it is! i went looking for that song right after i heard it! >.< i love it so much '

cast : Louis Koo, Sunny Chan, Jessica Hsuan, Charmaine Sheh, Lee San San, Anne Heung and Eileon Yeow........

i love this series very much. it's the one of series that make me love HK series.....

esp.... i love Louis and Jessica. They are the best couple in my memory!!!!!

and you? what do you think? let's join!!!!!



story overview :

Shan is a judicious and objective chief inspector, whereas, Fei (Louis Koo) is a self-dependent officer who always acts arbitrarily. Although they have different personalities, Shan intelligently takes advantage of Feiกฆs keen intuition and ample experiences to solve big crimes. On account of Shanกฆs cooperation, Feiกฆs career begins to flourish and he starts to admire Shan. At last, they even become great partners. In their love lives, they both struggled in two different relationships : Fei cannot forget his missing girlfriend, QinQin. Until the emergence of Chiu Kuan, he finally puts down his love towards QinQin and falls in love with Kuan. At the same time, Fei obtains the news of QinQin and immediately falls into a dilemma between his love ones. On the other hand, Shan doesnกฆt want to leave his girlfriend, Lan, alone. So he decides to give up his other girlfriend, Yu, who he truly loves

thanks : www.kootinlok.net for pic and story!!!!

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Just finished watching this serie!!! I like it very much!!! The storyline is very exciting! And yes, Louis and Jessica make a pretty good couple!!!

Yeah I agree with you, DIF 4 is is one of best series. I really enjoyed watching each case and the cast is very good too. I agree that Louis and Jessica do make a good couple in the series. I find that the ending is sad, because they couldn't be together. It's sad that Anne had sacifice herself to prevent Roger from coming back to HK....but I just didn't like that fact that Louis went with her at the end (i know he had no other choices), maybe i just didn't like Anne in the first place

This is the first series that I seen anne here. Is this anne first series after winning miss hk?

ัya, i didn't like her very much......she make breaking point in their love......the ending so sad.......

good series. mystery and action... all four was good but 3 was most interesting

I think this was the first series Anne acted after Ms HK. Don't seem to find any chemistry between Louis and her.

But the chemistry between Louis and Jessica - just unbelievable!!!

i love this seire to
one of my fav
the ending just make me crazy as loluis and jess were so good together and anne came in
but i think this is best ending the script writer can write i think otherwise Cian cian die : )

are they ever gonna make a #5 one...this series was awesome..I want more

Louis is unlikely to be back in TVB, so the chances of DIF V is practically zero. Unless they want to change the whole cast and storyline.

this series is so good

jessica n louis have unbelievable chemistry

this is one of my all time fav serie
not only because Louis and Jessica characters but mainly because of Lee San San's character
the scene in the hospital with Louis and Jessica is so dramatic

I actually thought Anne's sacrifice was kinda dumb.. I haven't watched this series in a while.. so please correct me if I'm wrong.. She pretended to be with Roger so that he would not return to HK and take revenge on Louis, right? That doesn't make any sense!! Louis is a cop.. he can protect himself.. if anything, wouldn't it seem more like she was trying to protect her own life??

ohmygoodness, i LOVE DIFIV!!! of course it has NOTHING to do with the other DIF trilogy..... a total other series. my goodness, Louis Koo & Jessica Hsuan was so unbelievable! u see, i was already fancing both of them individually before this happened, but this is like a dream come true! their chemistry was amazing! glad that both won favourite actor & actress respectively in 1999's TVB anniversary.

oh, but i hated the ending though... i didn't think Chinchin would be happy anyways if tsui fei went back to her... tvb's twist... aiihs.

I love DIFIV!!!! One of the best series I watched!! Too bad there's no DIF 5..

It is good because of the two main characters but I still like the first three episodes better.

i havent seen the first 3 yet
is it similar storyline to dif4 with diffrent cast?

This one is not yet my favorite. But I remember clearly falling deeply into their love story. Cases wasnT that impressing if I dare to compare with DIF 1-3 cases. but I would say that DIF4 got really good pairings. All refreshing and looking good on screen. My favorites couples in this serie was Louis-Jessica and Sunny-SanSan. I felt so bad when she died. It was from that serie that I started to dislike Charmaine but not anymore hopefully...

I enjoyed every part with Jess and Louis. Their chemistry was undeniable. My most memorable scene was also in the hospital. I felt all their love and pain during that moment. No wonder they had won award for it !!!! Louis knows to cry !!! and I love him so !!! So bad hes more into movie than serie ...

i think i like the frist 3 parts of the olds better.

i agree that the first three were much better because of the cast. michael tao and kenix kwok had good chemistry. this series was interesting at points. too bad jessica and louis didn't end up together.

i loved the first 3 but dont think they could've stretched it out anymore with the same characters. Shame the stories and chemistry was not as good in the 4th

i thought they were gonna make a sequel soon but i guess not

I just finished watching the recently VCD-released version of Detective Investigation Files IV.. This is the RETAIL version..

Apparently.. the ending where Louis is in the bar and he sees Jessica and Sunny meeting up for a drink got cut. Instead, the series ends with Sunny visiting Lee San San at her grave.

The original ending.. to me.. implied that Sunny and Jessica had a chance of getting together and that Louis still loved Jessica. The new ending implies that Jessica simply accepts Louis and Anne and is moving on with her life. And Sunny will forever love Lee San San.

WHY WOULD TVB SUDDENLY CHANGE THE STUPID ENDING?!?!?! What is the point of owning the retail version if it's gunna be different from the original series?!?! I'm so pissed off.................

Actually, I don't think tvb 'suddenly changed' the ending....because the version I watched back then never had the scene at the bar and ended at lee san san's grave.

Now i'm aware ppl in hk got to see the extra scene after the credits rolled. So what i'm saying is there has always been two versions out there and you just got the one that left out that scene.

For some reason I didn't like that extra scene at the bar anyways. I like how it ended implying that louis was happy to be with anne and sunny is letting time heal the pain of losing sansan, but he knows charmaine still loves him and is a matter of time they get back together.

But with that bar scene, it's like all of a sudden they hook sunny and jessica up and louis is jealous...just doesn't go well for me.

hmm.. the original version that I saw is an US rental.. I liked the ending with the bar scene because it gives Jessica's character a chance at happiness. I didn't feel like either ending implied that Sunny will be with Charmaine though. Oh wells.. I still have the original version I saw on tape.. so I guess I'll be pulling that out soon .. hehe

Thanks for the info.. I never realized that there were 2 versions out there..

huh? It's been long time since i watch but i thought the ending bar scene had Jessica with a stranger she just met and Louis saw them thru the window and smiled? I didnt think it was Sunny.. maybe time to watch again..

So.. is the one released in america the original version or the tvb rechanged ending...

The Version that I has, it has both ending. First Sunny visited Lee San San's grave then it show the ending song. But after that it show the bar ending.

Although the ending is very sad, i still think it is the best series.

i am unaware of this ending, who is sunny by the way? i can't totally remember the series! having difficulty recalling it all.

The ending that I saw had Luis seeing Sunny and Jessica meeting up for drinks at the very end also. But that seen didn't come up until after all the credits were done, so maybe a lot of people missed it.

my memory of the ending is...

sunny visit san san's grave and later went to the bar. bump into jessica who happen to watch a soccer game. louis also drop by there.

maybe they just happen to be at the same bar. i dunno.

i don't remember the exact ending but i remember strongly of the bar scene because to me it gave me a big smile on my face. the bar scene implies that both of them had moved on and there was a possible chance she was going to hook up with sunny because louis left(going to take care of that other girl forever for feeling guilty) and she started talking to sunny in a very flirtacious way. thats what i remember, and to the big smile on my face is because im an "ANTI-jessica/louis." i don't hate louis but i hate seeing them together. and i hate the fact they're literally EVERYONES fav. couple.

sunny is that guy whom his wife died on their wedding ceremony. his wife lee san san was murdered, remember, flashback, ring a bell?

hmm.. that's interesting.. I didn't realize that the bar scene occurred after the credits. I did remember Sunny by San San's grave.. but I assumed that the bar scene just continued from there.. I def have to re-watch the tapes to check out the ending..



haha.. like I said earlier.. I liked the bar scene.. not because I'm anti Jessica/Louis. I did like them together in this series but they are certainly not my FAVORITE couple.. (the spot is reserved for Nadia/Ekin..) I liked this ending because I think that both Jessica and Sunny deserve to be happy.

On another note.. a scene that kind of annoyed me was when Louis dropped by Jessica's place after he had already chosen Anne.. I guess Jessica had asked him to drop by so she could return his house key and he goes all mushy on her and says how he wishes that she would always be the woman who has his house key and then he kisses and hugs her. C'mon Louis.. stop making this harder on the poor girl!! You're supposed to be with Anne now so stop torturing Jessica!! SHEESH..

wow i never know that they have a different ending....cool..but i think i like the 1st ending better......

Hmm, so u didn't think sunny and charmaine can get back together again?...

I remember there was one scene near the end when sunny was about to open a door with a bomb attached to a string and at that time charmaine called him b/c she was worried about him and it eventually saved his life. I kno it doesnt seem like much, but it kinda showed how they both needed each other.

I dunno, i thought the scene at san san's grave and sunny looking at the airplane was a symbol that he needs time to get over san san but charmaine is very much in the back of his heart.

I guess with that in mind, seeing sunny and jessica together was a bit weird.

Man, they really need to make part 5 to DIF!!!

2 version.....? oh! i never know it before....

my momery about the ending is....louis met jess in the bar and they were talking together.....and the phone ringing....then sunny appeared....and louis had wondering face.....maybe he was jealousy....






you're the big anti louis/jess fan.....ok, but i'm the big louis/jess's couple fan i love them when they were pair up together!!! ok,....nice to meet u!

Although I didn't watch the other three DIF's, but I definitelly like DIF IV a lot. The police and how they dressed and acted seemed a little bit unrealistic but nevertheless I loved the story between a Fei and a Quin. It seemed like TVB was setting up for a potential DIF V with that last scene after the credits where ah Fei sees ah Quin in the bar. But with Louis not coming back, it doesn't seem likely. Sigh....

I just finished this series less than a month ago. The ending was sooo sad!!! *tear*

Did anyone else notice that Jessica and Anne play almost the same roles in DIF4 as in Golden Faith? (i.e. Jessica is the one he loves, Anne is the one he feels obligated to) The only difference is the guy and the guy's choice. Was TVB trying to make up for the DIF4's bad ending with GF?

Yeah, I remember watching that clip after the credits. What I don't understand is why must HK and Taiwanese producers make "versions" of a series? I can understand if they decided to put something on DVD to include extra stuff but the series should still be the same. I find it frustrating especially if I am trying to find the "original" series.

Maybe except this time it was Gallen Lo and not Louis Koo. I think TVB tried to make it up in A Step In The Past though.

ooj my favourite story was the one where they were stuck in the "staged" neighborhood...goodstuff DIF is...what are 'your' favourite parts?

I think the INCLUSION of the bar scene was just to imply that there might be a sequal (DIF V)...but since they're not going to make one...they probably took it out on the DVD version

yeah, maybe Golden Faith is the part II ....hahaha

Hmm.. this makes a lot of sense.. for me, it didn't necessarily imply that a sequel was possible.. it just gave me a feeling of closure for sunny and jessica. Everyone else had a happy ending except for them!

On another note.. I wish TVB produced some good quality dvd versions of series.. and included extras like American dvds. I'd love to see some cast interviews, music videos, alternate endings, etc

I like the series, 2 bad Louis Koo doesnt sign with TVB. I was looking forward to DIF 5