Chuck Lorre's dark but funny comedy series about characters in recovery for substance addiction returns for its eighth season without one of its leading ladies, Anna Faris, who has departed the show for other ventures. Her colleague, Oscar and Emmy winner Allison Janney, continues in her role as Bonnie, who invites the other women in her social circle to a slumber party that includes some childhood games that reveal adult issues in "Sex Bucket and the Grammar Police," the season premiere. Mimi Kennedy and Jaime Pressly also return.