NBC has a lot of long clips (6 to 10 minutes, including the end reveals) of Columbo on YouTube so I've been binging those. Peter Falk is just a total delight in those and it's all top tier comedy. Columbo is one mean son of a bitch in sheep's clothing, especially with the sidekick that never got to be, Sergeant Wilson.
There's some third degree burns laying all over ("Some man do not like to look like an unmade bed, Lieutenant.") and in a way Columbo is a master class in playing a persona in society.
Some of the highlights / notable deviations :
- Columbo getting genuinely angry at Leonard Nimoy's contempt for human life.
- The Dead Weight episode where an eyewitness get gaslighted by the killer plus her toxic mother and jarringly by Columbo himself. She's really the central character of that episode, though.
- The Commodore which is an actual whodunit for once and looks... boring.
- The midly offensive Mexico episode with R.Montalban. Overall I'd say the show did age mostly gracefully on that front.
Though the show has plenty of moments where Columbo clearly acts different when not speaking to the killer, much more matter of fact.
The second, later run of episodes is clearly weaker (and Falk was getting really old) but cut like this it's less apparent. They clearly relied more on using gimmicks for episode (Columbo is a guest teacher at the university ! Someone wants to kill Columbo ! Columbo is a stage director reveal !).
Some of the reveals get a little flimsy and unrealistic (the whole multiple switcheroo of an object in the Louis Jourdan's épisode... Great scene though. Or the shoelace thing with R.Conrad) and they did recycle some bits.
- Peter Falk went to Romania to calm citizens there after the TV ran out of episodes in 1974 which apparently put them on the verge of rioting ?
- Two of the main creators for the show also produced Murder, She Wrote so you know... Respect.
- The aforementioned sidekick was reportedly a demand by the network, such as the dog Dog though this one had an infrequent but regular part in the mythology.
- I knew they tried to make a show out of Mrs.Columbo but I didn't know it was Kate Mulgrew they gave the role to.