Round Trip to Nowhere
January 2, 1971
Mannix helps a beautiful widow hunt for her husband's murderer, a search leads to an abandoned mine in Death Valley.
Guest Cast: Tim O'Connor, Susan Howard, Jerry Douglas, Larry Pennell, Kevin Hagen.
Credit

I am looking into the details of these shows, I got the info that he played in these 2 eps. from Mannix
(thank you)

A Copy of a Murder

Lost Sunday