Mannix/The Upside Down Penny
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The Upside Down Penny is the eighth episode of the sixth season of Mannix, and the one hundred thirtieth episode overall.
Guest Star: Frank Marth (Henry Crawford)
Additional Cast: Ward Wood (Lt. Malcolm), Vaughn Taylor (Dealer), Joe Perry (Spieler), Bartlett Robinson (Riley), Tom Stewart (Cavanaugh), Johnny Silver (Operator), Art Lewis (Clerk), Judith Doty (Mrs. Brooks)
A cute kid hires Mannix to find a rare stamp stolen from his stamp collection, but the detective soon discovers that someone is willing to kill for the stamp.