It's How You Play the Game - S4-E19
Continuity mistake: At the scene of the vehicle accident, when Roy's on the Biophone with Rampart the squad's lightbar is on properly, the center chrome piece has vertical slats that face forward. However, after the victim is removed from his vehicle, when Johnny's on the line with Rampart note the squad's lightbar again, the center chrome is now on backwards, the solid side faces forward.
It's How You Play the Game - S4-E19
Continuity mistake: When Squad 51 dispatched to 'man bitten by animal', the center chrome on lightbar is a solid piece, but en route the chrome center is striped and its trim is covered with black tape. Then when they approach the car lot, the black tape is gone.
It's How You Play the Game - S4-E19
Continuity mistake: When Johnny is in the ambulance with the car salesman that was bitten by the tiger, Johnny opens the man's shirt, but does not remove his western tie scarf. However, in the man's closeup the tie is open with the scarf slide removed, and then it's back to being tied with the slide.
It's How You Play the Game - S4-E19
Continuity mistake: While Johnny tells the other guys that the losers of the baseball game, between 51 and 36, will have to pay for the entire cost of the picnic, Chet's eating an apple which has less eaten by the time he tosses it into the garbage.
Answer: I believe you are speaking of the old man, Mr. Wilson. He's played by J. Pat O'Malley.
Bishop73
Correct, it was J. Pat O'Malley...he also played the grandfather with his grandson when their rocket exploded, and also played "Old Bill" in the episode with Ann Prentiss, where Gage saves the little girl from the burning tree house, and her mother falls in love with him.