Singer has also appeared on numerous Supernatural gag reels starting around Season 3. He has previously directed episodes of Midnight Caller, Lois & Clark: The New Adventures of Superman, and Hack. Bobby Singer is named after him, as a gift from Eric Kripke. In Hunteri Heroici, Singer provided the voice for BOB the cat, and in Inside Man, he provided the voice for the angel who ordered more back-up.