 CONT: Two goofs in one scene: When Columbo first meets Nelson  Brenner in the hallway outside the lecture room Columbo hands a  photo to Mr. Brenner, who looks at it, then hands it back to  Columbo. In the very next shot, as Brenner walks away, he is handing  the photo back AGAIN to Columbo. Then Columbo and Brenner go into a  nearby room where Brenner pulls out a small address