Margaret begins dating Karl, a fellow Shady Meadows resident who may or may not be the Zodiac Killer. Meanwhile, the guys are hunting for a different kind of criminal: a serial non-flusher.

Hank volunteers to host a close-circuit TV show at Shady Meadows until he is soon replaced by Sid, who openly shares retirement home gossip; Margaret offers to help Charlie get better acquainted with a widow from her bereavement support group.