The Texas Wheelers is an ABC situation comedy television series that aired in 1974 and 1975. The series, produced by MTM Enterprises, is about the cantankerous but lovable Zack Wheeler, a long-lost father who returned to raise his children Truckie, Doobie, Boo, and T.J. in rural Texas after their mother died. The show was not successful, due to being broadcast against the second half of NBC's The Rockford Files, and was canceled after four episodes in the fall of 1974. An additional four episodes were aired in June and July 1975. The show is notable as one of MTM's few flops, and for the well-known actors in its cast, including Jack Elam as Zack, Gary Busey as Truckie, Mark Hamill as Doobie, Tony Becker as T.J., and Lisa Eilbacher as the Wheelers' friend Sally. The theme song for the show was "Illegal Smile" by John Prine.