Leighton....sorry....my mind is in a brain-freeze at the moment.....I know I have heard them all, and I can actually hear Columbo and the murderers speaking these lines...put I just can't place them....(without cheating that is!! but I never cheat on these things.)
Damian and David have no's 2, 3 & 5 correct between them. Well done!
OK - here's a couple of clues. No. 1 is from an epiosde which Peter Falk certainly liked but it had bit of a slating on this board a while back, largely because of it's factual indiscretions.
No. 4 is from one of the best in the series - it won an emmy; it's one of the few Columbo epiosdes to have a singular location and the scenes between Columbo and murderer are fantastic; also, the murderer is unrepentent about his crime.
I'll give you until tomorrow; maybe, I'll do another one then....
I'm almost sure (but not positive) that it was The _____ Jones Show. I remember thinking it was kind of cute that the last name was Jones (as in Davey Jones and his infamous locker!)since Hollister was on his boat at the time. But I don't remember what the first name was.........so I'll just say The David Jones Show...(in honor of you David!! )