Christine Sadler

Christine Sadler is the grandmother of Rachel and Sean and the mother of Tracy.

She first appears in 2012, playing the part of the receptionist over the microphone in "Grease"

In 2013, she is murdered in '"Criminal Minds". Later in the year, she signs and pays toward the charity in "The Fundraising Event". She is apart of the final clue in "Treasure Hunt"' and praises Tom.