^Let's see, just from memory... Charles Dierkopf, Peter Brocco, the guy who played Crewman Green (Bruce something?), Ken Lynch, and... I dunno.
And its Dierkop
and the last one is Kenneth Washington - the unlucky Watkins from That Which Survives
And Kenneth Washington is also the guy who replaced Ivan Dixon as the token African American radio genius on Hogans Heroes for its last season or so..