BigBrain    

(honestly lupin the third is a mess of a franchise because of constant changes in animation companies, the fact it's a series that's existed since the late 60's, there's parts instead of seasons even though technically the parts are seasons so it's kind of like ehghjeghj????, part 3 took place in the 80's while part 4 took place in the 2010's, you get it. but it's still really good and ignoring how freaking annoying the womanizer lupin parts are seriously lupin i will hit you with a frying pan stop going "AWOOGA" whenever you see a woman, IT'S A PRETTY GOOD, FUNNY, AND CHARMING FRANCHISE.)
(i swear it is, but like, if you go into the series it's best you go in expecting some bad jokes and bad ideologies)