Acting

2018

Freaks and Geeks: The Documentary as Self

2014

Dennis DeYoung and the Music of Styx - Live in Los Angeles as Himself (Vocals / Keyboards)

2007

Styx - Caught In The Act as Himself (Vocals / Keyboard)

1997

Styx - Return to Paradise as Himself (Vocals / Keyboard)

1983

Kilroy Was Here as Robert Orin Charles Kilroy (R.O.C.K.)

Writing

1983

Kilroy Was Here … Story