Here in Oregon, Perry Mason has been on nearly every weekday at noon for longer than I've been alive. It's kind of a family tradition to watch every day in the summer and during vacations. This summer, I've noticed a number of actors have been on both the Monkees and Perry Mason.
* means multiple Perry Mason appearances (that I've seen)
# means victim
• means murderer
Richard Devon (Victor the Knife thrower, Monkees at the
Circus)
Patrice Wymore* (Madame Quagmire, Monkees A La Mode)
John Hoyt* (I think he's the Professer, I Was a Teenage
Monster)
Jaques Aubuchon*, The Case of the Capricious Corpse,
#The Case of the Garrulous Go-Between (Boris, The Spy Who Came In From
the Cool)
Robert Strauss (The Police Chief, Alias Micky Dolenz)
(He's been on Bewitched, too, as Charlie Leech, a man blackmailing Samantha
and Darren.)
James Frawley, that one Perry Mason in Hawaii (Monkees
director and sometimes actor)
The guy who plays the farmer in Gift Horse and the preacher
in Hillbilly Honeymoon, I think... I'm not sure he was on Perry Mason.
*