I thought Brimmer was his best work. he seems very intellectual as an actor and that part suited him to a tee. Plus the dual view in his glasses at the time of the crime was well done.
I like those glasses effects, like the flower in Alex Benedict's sunglasses at Miss Well's apartment.
Yes, Bart Kepple was the best.Especially because of the trick how he fooled Columbo when they were driving to the cinema where Kepple killed his assistant.Columbo didn't tell Kepple where the murder happened and Kepple was smart enough and he asked Columbo about it.We can see a disappointment on Columbo's face because he thought that Kepple will catch himself into a trap.
I liked Culp's performance in "The Most Crucial Game" best. He plays the very aggressive murderer who simply does not believe that Columbo can keep up with him. Unusual character twist. He covers his fear of being arrested by his attitude.