Connor and Caitlin are two streamlined tender engines from the Other Railway.
- Season 12: Vicarstown Takedown
- Season 13: The Duke of Hazard (Connor only; Caitlin cameo), Who Stole The Coal? (Caitlin only; Connor cameo), Ivo Hugh's Day at the Zoo (Connor only), Sideplates and Skirmishes (Caitlin only; cameo), and How Gator Stole Christmas (Caitlin only; cameo)
- Season 14: Millie's Castle Hassle, Cabless Companions (Caitlin speaks; Connor cameo), Merlin the Magical Engine (Caitlin only; cameo), Dirty ‘Arry (Connor only; cameo),
- Season 15: Flash Gordon (Connor only), Toby's Turntable Fable (Caitlin only), Jock Beats the Clock (Connor only; cameo), Polar Express Coming Through! (Caitlin only; does not speak), The Island of Misfit Engines (Caitlin only; does not speak), and A Christmas Caroline (Caitlin only)
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