Seeing is Believing

Seeing is Believing is the thirteenth episode of the twenty-second season.

Plot
Merlin comes to Sodor from the Mainland for the first time. He thinks that when he shuts his eyes, nobody can see him. Percy hears everyone talking about the 'invisible' engine and wonders why he has not seen him.

Characters

 * Thomas
 * Gordon
 * James
 * Percy
 * Emily
 * Merlin
 * Nia
 * Rebecca
 * Salty
 * Annie and Clarabel
 * Trevor
 * Cranky
 * Carly
 * Porter
 * Diesel
 * Paxton
 * Owen
 * Reg
 * Big Mickey
 * Jem Cole
 * Cyril the Fogman
 * Farmer McColl
 * Toby
 * Henrietta

Locations

 * Vicarstown Bridge
 * Brendam Docks
 * Sodor Shipping Company
 * Tidmouth Sheds
 * McColl Farm
 * Wellsworth
 * Wellsworth Scrap Yard
 * Blue Mountain Quarry

UK

 * John Hasler as Thomas
 * Keith Wickham as Gordon and Salty
 * Rob Rackstraw as James
 * Nigel Pilkington as Percy and Trevor
 * Teresa Gallagher as Emily, Annie and Clarabel
 * Yvonne Grundy as Nia
 * Rachael Miller as Rebecca
 * Hugh Bonneville as Merlin
 * Lucy Montgomery as Carly
 * Matt Wilkinson as Cranky

US

 * Joseph May as Thomas
 * Kerry Shale as Gordon
 * Rob Rackstraw as James
 * Christopher Ragland as Percy and Trevor
 * Jules de Jongh as Emily
 * Yvonne Grundy as Nia
 * Rachael Miller as Rebecca
 * Teresa Gallagher as Annie and Clarabel
 * Keith Wickham as Salty
 * Hugh Bonneville as Merlin
 * Lucy Montgomery as Carly
 * Glenn Wrage as Cranky

Trivia

 * This episode marks Merlin’s first appearance since Journey Beyond Sodor and his first full appearance in an episode.
 * In this episode only, Trevor receives a new whistle sound.
 * At the end of the episode, Thomas mentions the events of the nineteenth season episode, The Other Side of the Mountain. Stock footage from said episode is used.