TV theme songs used to be radio hits.

At least six of them made the Billboard Hot 100 in 1976 alone.

S.W.A.T. and Welcome Back both went to No. 1 that year.

Happy Days reached No. 5 and Laverne & Shirley No. 25.

Hawaii Five-O got to No. 4 in 1969.

Greatest American Hero stopped at No. 2 in 1981.

Miami Vice went to No. 1 in 1985 with no words at all.

Cheers barely charted, at No. 83 in 1983.

Peter Gunn charted in 1959 and again in 1986.