Mrs. Wagner is the mother of Sarah. She appeared at her wedding rehearsal dinner, sitting next to Jack. She also attended the actual wedding, but she was only seen in a promotional still of that scene. ("Do No Harm")
When Sarah decided to leave Jack, Mrs. Wagner came over and helped her to pack. This was later mentioned by Sarah to Jack. ("The Hunting Party")
- It is not stated in the episode that Barbara Baehler's character was Sarah's mother, but according to the portfolio of the actress, she portrayed "Jack's Mother in Law". Therefore, she is Sarah's mother.
- Beside portraying Mrs. Wagner in season 1, Barbara Baehler has also portrayed Mrs. Talbot in season 3 ("The Man from Tallahassee").