Which two studios produce The Bachelor ?
Revue also produced later seasons of " The Jack Benny Program " for CBS and NBC and in co-operation with Jack Benny 's J and M productions " Checkmate " , " General Electric Theater " and " Alfred Hitchcock Presents " for CBS , " Studio 57 " for DuMont , and westerns such as " Tales of Wells Fargo " , " The Restless Gun " and " Laramie " for NBC , as well as " Wagon Train " for NBC and ABC , and the first two seasons of NBC 's " The Virginian " , based on a film released originally by Paramount Pictures , whose pre-1950 theatrical sound feature film library was sold to MCA in 1957 .