a production of WGBH Boston and WITF, Harrisburg; produced by Beth Hager and Randall MacLowry ; written by Ken Emerson and Randall MacLowry ; director, Randall MacLowry
Frixos Constantine presents an Anglo-Soviet co-production by Poseidon Productions Ltd., England, Sovietfilm and Mosfilm, U.S.S.R ; written and directed by Emil Lotianou ; Western version supervised by Michael Powell