We don't have a biography for Sid Onslow yet. Hang in there, or go ahead and contribute one.
Appearances
Pennyworth: The Origin of Batman's Butler
Guest cast, played by Simon Day
- Episode 1x02: The Landlord's Daughter (Aug 4, 2019)
- Episode 1x03: Martha Kane (Aug 11, 2019)
- Episode 1x04: Lady Penelope (Aug 11, 2019)
- Episode 1x05: Shirley Bassey (Aug 18, 2019)
- Episode 1x06: Cilla Black (Aug 25, 2019)
- Episode 1x07: Julie Christie (Sep 8, 2019)
- Episode 1x08: Sandie Shaw (Sep 15, 2019)
- Episode 1x09: Alma Cogan (Sep 22, 2019)
- Episode 1x10: Marianne Faithfull (Sep 29, 2019)
- Episode 2x02: The Burning Bridge (Dec 20, 2020)
- Episode 2x05: The Bleeding Heart (Mar 7, 2021)
- Episode 2x06: The Rose and Thorn (Mar 14, 2021)
- Episode 2x07: The Bloody Mary (Mar 21, 2021)
- Episode 2x08: The Hangman's Noose (Mar 28, 2021)
- Episode 2x09: Paradise Lost (Apr 4, 2021)