Ness's No. 2 Man
I think Paul Picerni was absolutely great as Lee Hobson as Robert Stack's no. 2 man, beginning in the 2nd year of the series.
I've heard the reason given for Jerry Paris's termination from the series in the 1st year as the no. 2 man was lack of chemistry wiht Stack. (Stack had complete actor, writer, director and producer approval.) I've heard two reasons given for the replacement of the actor who followed paris- Anthony George, as Cam Allison. The two reasons were: (1) George was starting to overshadow Stack; and (2) George had already accepted the starring role (as the no. 1 actor) in an upcoming series, "Checkmate."
Watching the three actors again on various episodes of the series (I also saw the sweies when it first aired), I wonder if there was another reason for the replacement of Jerry Paris and Anthony George. Both are about 6'1" or 6'2"; while Stack was about 5'11" and Picerni was 5'9." Just about every star has an ego, and I wonder of the primary reason or one of the reasons for the replacement of the intial two no. 2 guys was simply that they were taller than Stack. The actor who subsequnetly played for 3 years in the series- Picerni- was shorter than Stack at 5'9."
Also, Anthony George was quite good looking and was cool. I could see how Stack may have felt competition from him that he didn't want.
Just a speculation on my part. I could be completely wrong.