Originally sponsored by the Ford Motor Co., which supplied all the vehicles used on the show. Earlier episodes had the actual case numbers in the opening credits. For this series, Efrem Zimbalist Jr., was provided with an FBI identification card that had a recent photograph of him, fingerprints from his Army service, and an identification number that was only one digit less than a genuine number. W. Mark Felt, the F.B.I. associate director later unmasked as the infamous Watergate info ...[Read Story ]