I remember Mahtin Sheen. It was weird that he played an old cop buddy of Cannon’s on a pair of episodes and later appeared as a murderer. They did that a lot back then but wouldn’t get away with it on modern shows.
QM tended to recycle guest stars.
As formulaic and predictable as his shows were, I still like them better than the stuff of today.
He had one short lived series called “Most Wanted”. It had a different vibe.
I think of it as “Strike Force” before the a later series of the same name. They both starred Robert Stack.