In A Chance to Live, Cassidy portrayed undercover police officer Dan Shay, a cop who successfully infiltrates a high-school drug ring as a fellow student.
He reprised the role of Officer Shay for the Man Undercover series, which aired on NBC from November 2, 1978 to July 12, 1979.
The role of Shay's wife, portrayed in "A Chance to Live" by Dee Wallace, was recast with actress Wendy Rastatter for the actual series.
[citation needed] Set in Los Angeles, the series stars Cassidy as undercover police officer Dan Shay.
The plot of a twenty-something cop going undercover in high school would be used more popularly the following decade in 21 Jump Street.