QI Guest cast, played by Tom Allen Episode 17x13: Quills (Jan 24, 2020) Episode 18x02: Ruff and Reddy (Jun 4, 2020) Episode 18x16: R Animals (Mar 27, 2021) Episode 20x10: Trundling (Jan 30, 2023) Episode 21x09: Unrelated (Feb 27, 2024)