There's a good reason why Dennis Dugan turned to directing, rather than continue his acting career.
Dugan was supposedly a hot commodity in the late 70's after appearing on The Rockford Files, which led to a spinoff series, Richie Brockelman, Private Eye, that served as a placeholder while Rockford went on vacation in 1978.
The problem? The boyish Dugan lacked the charisma of Jim Rockford himself, James Garner, and despite the creative pedigree involved (Stephen J. Cannell & Steve Bochco), Richie Brockelman flopped---badly. Seems NBC wanted their own Hardy Boys, but got a bumbling solo act.
The Rap Sheet offers a sample intro, including a quick appearance by Garner as Rockford, a sponsor tag, and closing credits:
Today, Richie Brockelman is a distant memory, though Dugan has avoided the temptation to revisit the character----if only to give the part to Adam Sandler for a movie.