I just found this on Youtube. It’s an Emmy retrospective on HILL STREET BLUES from 1987, the year the show ended its run. Jon of course played the part of the pompous and somewhat bellicose Chief of Police Fletcher P. Daniels for the entire run of the series. There is one shot of Jon in the video. Daniels gets hit by series regular Dennis Franz who played the part of Lt. Norman Buntz. I might say that Jon took that punch pretty good. Here’s the video.