Candidate For Crime
Nelson Hayward (Jackie Cooper) smashes a watch on the victim's wrist, to fake the time of death as part of his alibi. Hayward has to substitute a flimsier watch
because the victim's own watch was indestructible -- which Columbo immediately guesses with an observation that only Columbo would make: The watch doesn't go with his shoes!
Death Hits The Jackpot
Killer Leon Lamarr (Rip Torn) repeats the "smashed watch" trick, this time in staging a bathtub accident. Again the trick backfires because Columbo notices that the watch has no serial number -- why would the victim wear a cheap watch into the tub, knowing it's not waterproof?
Projection room clock - Grace's movie was still running after "The Tonight Show with Johnny Carson" ended. Why did the movie take an extra 15 minutes to finish playing?
Darkroom clock, as Roddy McDowall sets timer for "exploding cigar" bomb Listening to tape of explosion, Columbo notices how Roddy compulsively checks his watch.
Columbo's reverse blow-up: Was it 10 am or 2 pm?
Colonel Rumford's watch - he's almost ready to go.The jug was visible only from 6:10 until 6:25