Here are 3 interesting links, parts 1, 2, and 3 of a Hogan's Heroes titled "Color the Luftwaffe Red." James Mitchell Vickery has a guest-star role as a Luftwaffe colonel.
Jim Vickery's son was an actor. He starred on the soap opera "the Secret Storm" in the 60s. He was married to Colleen Dewhurst and later Diana Muldaur. He died in 1969.
Jim Vickery and I acted on different episodes of Eischied (he was in the pilot) and McCloud (on which Diana Muldaur co-starred with Dennis Weaver).
I met Diana a couple of times while she was staying in Laurel Canyon while shooting McCloud. Jim Vickery was at their home in Pacific Palisades (too far to commute to Universal Studios). She mentioned her husband but never by his full name. I think I might have said something if I'd known her husband Jim's last name was Vickery.
I feel as if I just missed him.
Jim Vickery was with Hardeen from Houdini's death (starting in 1927) through the Million Dollar Pier period (1933-), then, things got slow. Hardeen didn't make the kind of money Houdini did and couldn't pay the assistants as well as Houdini had. Things got pretty rough for Hardeen in the late thirties then came Hellzapoppin which rescued him. Jimmy Collins worked on Hellzapoppin. Apparently, Jim Vickery did not.
Vickery did help Hardeen on Parent Assembly and Magicians' Guild shows and special performances until Hardeen died in 1945.