In 1966 Cowles played the title role in
Edward Albee's short-lived adaptation of
James Purdy's comic novel
Malcolm on
Broadway at the
Shubert Theatre. In 1968, he appeared with
Al Pacino and
John Cazale in
Israel Horovitz's
The Indian Wants the Bronx. In 1983, Cowles joined
The Mirror Theater Ltd's Mirror Repertory Company for their first repertory season, performing in
Paradise Lost,
Rain,
Inheritors, and
The Hasty Heart. Cowles' first television part was Joe Czernak in the series
NYPD in 1969. He was nominated for a
Daytime Emmy as Outstanding Actor in a Daytime Drama Series in
1978 and as Outstanding Supporting Actor in a Daytime Drama Series in
1981, both for his part as
Billy Clyde Tuggle in
All My Children, a role that he created and wrote. ==Personal life==