I didn't see this in the goof section.... In "A Friend In Deed," when the Commish looks at Jessup's file.... the address has "NY." What's up with that?
My girlfriend spotted one yesterday in "A Trace of Nurder." When Columbo anednd Pat are talking in one scene, his cigar keeps disappearing and reappearing.
Actually, that part of the sheet was mentioning Jessup's place of birth as New York so it's not a goof.