Here we go:

#1 is from Old Fashion Murder and yes, it is when Columbo gets the haircut.

#2 is from Strange Bedfellows Graham McVeigh had had enough questioning.

#3 comes from RIP Mrs. Columbo. Columbo was referring to the way Sgt. Brady was driving.

#4 is Abagail Mitchell in Try and Catch Me.

#5 was at the dog show at the beginning of Murder, a Self Portrait.

#6 is from Undercover. Spoken by Dorthea McNalley

#7 -- ROBBIE is the answer. Spoken by Ruth Stafford in An Exercise in Fatality

#8 comes from Hugh Creighton in Columbo and the Murder of a Rock Star.

#9 is Columbo talking to kay Freestone in Make Me a Perfect Murder

#10 comes from Columbo Likes the Nightlife. It is spoken by the mobster right at the end of the episode as Col;umbo was leaving the nightclub after he solved the crime.

#11 is another one from Strange Bedfellows spoken by Columbo to Fortelli.

#12 comes from the Bye Bye Sky High IQ Murder Case. Spoken by the genius young girl to Columbo

#13 refers to Riley Greenleaf in Publish or Perish.

#14 is a great one from Columbo in Lady in Waiting when he was at the bar talking with Mr. Hamilton.

#15 is from Candidate for Crime when Nelson fired a shot into his hotel room at the end of the episode.