Monday's Closer ("The Round File") had several familiar faces:
French Stewart was Gary, the third-person speaking real estate agent who claimed to never lie. He's best known as Harry on Third Rock from the Sun.
Kathryn Joosten was the desk manager at the old folks home that killed off their unprofitable patients. Among many other things, she was Mrs. McCluskey (my husband is a popsicle!) on Desperate Housewives and Mrs. Landingham on The West Wing.
Classic game show raconteur Orson Bean played the guy who confessed to multiple killings just to the get police's attention (it worked).
Jonathon Del Arco recurred as the irritable coroner. He had a prominent role as Sofia Lopez on Nip/Tuck, and was the "disconnected" Borg "Hugh" on some thought provoking episodes of Start Trek:TNG.