Character mistake: The animal control officer tells Kolchak he was crazy shooting off a flash bulb at the gorilla, but the first frontal shot Kolchak took of the gorilla did not flash at all.
They Have Been, They Are, They Will Be... - S1-E3
Continuity mistake: While Tony Vincenzo is eating, his butter knife instantly turns into a fork in the next shot.
Coach Toomey: Actually, Burdett never made the team.
Carl Kolchak: No?
Coach Toomey: You see, his butterfly stroke was like an effeminate moth.
More trivia for Kolchak: The Night Stalker