Dortmunder and his pals plan to steal a huge diamond from a museum. But this turns out to be only the first time they have to steal it...
Robert Redford
as John Dortmunder
George Segal
as Andrew Kelp
Ron Leibman
as Stanley Murch
Paul Sand
as Alan Greenburg
Moses Gunn
as Dr. Amusa
William Redfield
as Lt. Hoover
Topo Swope
as "Sis" Clara Kelp
Charlotte Rae
as Ma Murch
Graham Jarvis
as Frank, the Prison Warden
Christopher Guest
as Policeman
Zero Mostel
as Abe Greenberg
Harry Bellaver
as Rollo the Bartender
