After eight seasons on the air and reeling from the loss of series star Anna Faris,CBS is saying goodbye to Mom, the sitcom that paired Faris with The West Wing and 10 Things I Hate About You veteran Allison Janney. The series was built on the premise of Faris's character, and Janney's Bonnie (the titular mom in the series), who are both recovering addicts that have been living together and reconciling their differences. They were joined in the series by Mimi Kennedy, Jaime Pressly, Beth Hall, William Fichtner, and Kirsten Johnston, all of whom returned alongside Janney for a final, Faris-free season eight.