Your ok with #8, E, but not cotrect on the other one. And Laura, you're right on the ones that you guessed on. I'm going to let you think of the episode a little longer though. Cass....back to the drawing board !!
#3 is from Columbo Goes to the Guillitine when he accuses Elliot Blake of the murder at the end. And I think the elevator one (#5??) was from Murder with Too Many Notes when the elevator sound got onto the recording that Crawford was making. Guessing on that one.
#2. Laura was on the right track and in fact she was correct.
#3. Steve W. got it! From "Columbo Goes to the Guillotine."
#4. "Prescription Murder."
#5. This was from "Murder With Too Many Notes." Again, Steve was on the right trail here!
#6. This was tough. It was from "Butterfly In Shades of Grey" when Columbo and Fielding Chase broke down (well, the car was sabotaged by other police folks on the mountain, and Chase says this to Columbo regarding fixing the car.)
#7. "Swan Song."
#8. "Candidate for Crime."
#9. "Swan Song" again. I tried to trip you up, but you got it right!
Finally the E.C. question: Columbo was married to the Mrs. in 1966. We find this out in "Death Hits The Jackpot" where he is wondering what to get his wife for their 25th wedding anniversary. That episode aired in 1991, so do the math.