Final answer:
In 'The Office' episode titled 'Stress Relief,' the geriatric lead character portrayed by Cloris Leachman, with whom Sam (Jack Black) has an affair, is named Lily.
Step-by-step explanation:
The student is asking about a specific detail from an episode of the television show The Office. In the "Stress Relief" episode, the character of the geriatric lead, portrayed by Cloris Leachman, is named Lily. Sam, played by Jack Black, is involved in a steamy affair with her. This subplot is featured as a movie within a show that the characters Jim, Pam, and Andy watch together.