We don't have a biography for Mike Callahan yet. Hang in there, or go ahead and contribute one.
Appearances
Mercy
Main cast, played by Diego Klattenhoff
- Episode 1x01: Can We Get That Drink Now? (Sep 23, 2009)
- Episode 1x02: I Believe You Conrad (Sep 30, 2009)
- Episode 1x03: Hope You're Good, Smiley Face (Oct 7, 2009)
- Episode 1x04: Pulling the Goalie (Oct 14, 2009)
- Episode 1x05: You Lost Me with the Cinder Block (Oct 21, 2009)
- Episode 1x06: The Last Thing I Said Was (Nov 4, 2009)
- Episode 1x07: Destiny, Meet My Daughter, Veronica (Nov 11, 2009)
- Episode 1x08: I'm Not That Kind of Girl (Nov 18, 2009)
- Episode 1x09: Some of Us Have Been to the Desert (Dec 9, 2009)
- Episode 1x10: I Saw This Pig and I Thought of You (Jan 6, 2010)
- Episode 1x11: We're All Adults (Jan 13, 2010)
- Episode 1x12: Wake Up Bill (Jan 20, 2010)
- Episode 1x13: Can We Talk About the Gigantic Elephant in the Ambulance? (Feb 3, 2010)
- Episode 1x14: I Have a Date (Feb 10, 2010)
- Episode 1x15: I Did Kill You, Didn't I? (Mar 3, 2010)
- Episode 1x16: I'm Fine (Mar 10, 2010)
- Episode 1x17: There is No Room for You on My Ass (Mar 17, 2010)
- Episode 1x18: Of Course I'm Not (Mar 24, 2010)
- Episode 1x19: There is No Superwoman (Apr 21, 2010)
- Episode 1x20: We All Saw This Coming (Apr 28, 2010)
- Episode 1x21: Too Much Attitude and Not Enough Underwear (May 5, 2010)
- Episode 1x22: That Crazy Bitch Was Right (May 12, 2010)