 The show started 1961 in Cleveland, when Westinghouse owned Channel  3 and called it KYW. When Westinghouse won a court case against NBC  in 1965, they opted to own Philadelphias Channel 3, taking "KYW"  call letters and The Mike Douglas Show with them. New studios for  the show were on Walnut Street, but moved to KYW headquarters at 5th  and Market Streets near Independence Hall. Moved in 1978 to Los  Angeles.