The Harts visit the gallery of a well-known stamp collector to see the Vermillion, the most valuable stamp in the world. The Harts inadvertantly gain possession of the stamp and their lives are in danger.
Where to Watch Hartless Hobby
Cast of Hartless Hobby
Robert WagnerJonathan Hart
Stefanie PowersJennifer Hart
Lionel StanderMax
William Daniels
Whit Bissell
Peter Jason
Lee Wilkof
Ina Balin
David Landsberg
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