We don't have a biography for Mark Cyr yet. Hang in there, or go ahead and contribute one.
Appearances
Parenthood
Guest cast, played by Jason Ritter
- Episode 1x05: The Situation (Mar 30, 2010)
- Episode 1x06: The Big O (Apr 6, 2010)
- Episode 1x07: What's Goin' on Down There? (Apr 13, 2010)
- Episode 1x13: Lost and Found (May 25, 2010)
- Episode 2x18: Qualities and Difficulties (Mar 1, 2011)
- Episode 3x01: I Don't Want to Do This Without You (Sep 13, 2011)
- Episode 3x02: Hey, If You're Not Using That Baby... (Sep 20, 2011)
- Episode 3x04: Clear Skies from Here on Out (Oct 4, 2011)
- Episode 3x05: Nora (Oct 11, 2011)
- Episode 3x06: Tales from the Luncheonette (Oct 18, 2011)
- Episode 3x07: Forced Family Fun (Nov 1, 2011)
- Episode 3x08: In-Between (Nov 8, 2011)
- Episode 3x09: Sore Loser (Nov 15, 2011)
- Episode 3x11: Missing (Nov 29, 2011)
- Episode 3x13: Just Smile (Jan 10, 2012)
- Episode 3x15: Politics (Feb 7, 2012)
- Episode 3x16: Tough Love (Feb 14, 2012)
- Episode 3x17: Remember Me, I'm the One Who Loves You (Feb 21, 2012)
- Episode 3x18: My Brother's Wedding (Feb 28, 2012)
- Episode 4x01: Family Portrait (Sep 11, 2012)
- Episode 4x03: Everything Is Not Okay (Sep 25, 2012)
- Episode 4x05: There's Something I Need to Tell You (Oct 9, 2012)
- Episode 4x06: I'll Be Right Here (Oct 23, 2012)
- Episode 4x08: One More Weekend with You (Nov 20, 2012)
- Episode 4x09: You Can't Always Get What You Want (Nov 27, 2012)
- Episode 4x10: Trouble in Candyland (Dec 4, 2012)
- Episode 4x13: Small Victories (Jan 8, 2013)
- Episode 4x14: One Step Forward, Two Steps Back (Jan 15, 2013)
- Episode 4x15: Because You're My Sister (Jan 22, 2013)
- Episode 5x19: Fraud Alert (Mar 27, 2014)