From The Stargate Omnipedia
Father of Sarah O'Neill, Jack O'Neill's ex-wife. It is likely that he, like his daughter, lives in or near Colorado Springs.
As with the rest of the family Mike's life was tragically impacted when his grandson, Charlie, died in an accident with a firearm.
PLAYED BY - Wally Dalton
FIRST APPEARED - Cold Lazarus
Cold Lazarus - Sarah's father eyes Jack with some suspicion when he shows up unexpectedly at her home.