Series 18

The eighteenth season of the television series began airing on August 25th, 2014 in the UK and will begin on November 4th in the US. It will contain twenty-six episodes. Like the seventeenth season, five episodes were released on DVD in the US before airing on television.

Episodes

 * 1) Old Reliable Edward - The bigger engines tease Edward for being old and unreliable, especially Gordon.
 * 2) Not So Slow Coaches - Annie and Clarabel unexpectedly become part of Caitlin's high-speed train.
 * 3) Flatbeds of Fear - Salty tells the story of the "Flatbeds of Fear" which spooks the engines.
 * 4) Disappearing Diesels - The Diesels hide from Paxton.
 * 5) Signals Crossed - Toby is nervous when the signal at Knapford stays red.
 * 6) Toad's Adventure - Toad has an adventure on the main line with James.
 * 7) Duck in the Water - James has to rescue Duck from a flood, but ends up making things a whole lot worse.
 * 8) Duck and the Slip Coaches - James runs into trouble with some slip coaches which are used on the Great Western Railway.
 * 9) Thomas the Quarry Engine - Thomas works at the quarry while Diesel takes Mavis to see the sights of Sodor.
 * 10) Thomas and the Emergency Cable - Thomas has to stop quickly when a passenger pulls the emergency cable.
 * 11) Duncan and the Grumpy Passenger - Duncan tries his best to stop a passenger from complaining.
 * 12) Marion and the Pipe - Marion thinks she's found an old Viking ship, but it turns out to be a water pipe which springs a leak.
 * 13) Missing Gator - Percy struggles to remember what Gator taught him about being brave.
 * 14) No Steam Without Coal - Bill and Ben run out of coal and need Timothy's help.
 * 15) Spencer's VIP - All the engines compete for a chance to take a VIP.
 * 16) Toad's Bright Idea - Toad has an idea to help Gator run safely at night.
 * 17) Long Lost Friend - Gator returns to the island and he and Percy have a touching reunion.
 * 18) Last Train for Christmas - Connor has the tricky task of getting all of his passengers home in time for Christmas.
 * 19) Duncan the Humbug - Victor promises Duncan a coat of paint if he can stop grumbling for a day.
 * 20) The Perfect Gift - Percy tries to get Reg in the Christmas spirit.
 * Emily Saves the World
 * Samson at Your Service
 * Millie and the Volcano
 * Marion and the Dinosaurs
 * Timothy and the Rainbow Truck
 * Samson Sent for Scrap

Characters

 * Thomas
 * Edward
 * Henry
 * Gordon
 * James
 * Percy
 * Toby
 * Duck
 * Oliver
 * Emily
 * Bill and Ben
 * Harvey
 * Spencer
 * Hiro
 * Charlie
 * Scruff
 * Stephen
 * Connor
 * Caitlin
 * Porter
 * Gator
 * Timothy
 * Stafford
 * Diesel
 * Mavis
 * Salty
 * Den
 * Dart
 * Paxton
 * Sidney
 * Skarloey
 * Rheneas
 * Peter Sam
 * Duncan
 * Victor
 * Luke
 * Millie
 * Rusty
 * Marion
 * Annie and Clarabel
 * Henrietta
 * Toad
 * Rocky
 * Troublesome Trucks
 * Cranky
 * Owen
 * Reg
 * Sir Topham Hatt
 * Mr. Percival
 * Dowager Hatt
 * The Wellsworth Stationmaster
 * Gator's Driver
 * Thomas' Guard
 * The Welsh Bird Watcher
 * The Lady with the Big Hat
 * The Grumpy Passenger
 * The Deputy Minister
 * Some Children
 * Some Workmen
 * Harold (does not speak)
 * Rosie (cameo)
 * Stanley (cameo)
 * Ferdinand (cameo)
 * Belle (cameo)
 * 'Arry and Bert (cameo)
 * Norman (cameo)
 * Sir Handel (cameo)
 * Bertie (cameo)
 * The Teacher (cameo)

Characters Introduced

 * Samson
 * Slip Coaches

UK and AUS

 * Mark Moraghan as the narrator
 * Ben Small as Thomas, Toby, Rheneas and Owen
 * Keith Wickham as Edward, Henry, Gordon, James, Percy, Stafford, Salty, Skarloey, Den, Sir Topham Hatt, Mr. Percival, Dowager Hatt, the Wellsworth Stationmaster, Some Workmen, one of Sir Topham Hatt's Assistants, Gator's Driver, Thomas' Guard, the Grumpy Passenger, Sodor Steamworks Worker and Some Passengers
 * Teresa Gallagher as Emily, Mavis, Annie, Clarabel, the Lady with the Big Hat, and Some Passengers
 * Kerry Shale as Diesel
 * Steven Kynman as Duck, Peter Sam, Porter, Paxton, Dart and a Slip Coach
 * Togo Igawa as Hiro
 * Michael Legge as Luke
 * Jonathan Forbes as Connor
 * Rebecca O'Mara as Caitlin and a Slip Coach
 * Matt Wilkinson as Spencer, Charlie, Rusty, Rocky, Cranky, the Docks Manager and the Man with the Hat
 * Miranda Raison as Millie and the Knapford station speaker
 * Jonathan Broadbent as Bill, Ben, and a Slip Coach
 * Clive Mantle as Gator
 * Olivia Colman as Marion
 * Bob Golding as Stephen and Sidney
 * Tim Whitnall as Timothy, Reg, and the Deputy Minister
 * Joe Mills as Oliver, Toad, and the Welsh Bird Watcher
 * Tom Stourton as Duncan
 * David Bedella as Victor

USA

 * Mark Moraghan as the narrator
 * Martin Sherman as Thomas, Percy, and Diesel
 * William Hope as Edward, Toby and the Docks Manager
 * Kerry Shale as Henry, Gordon, James, Sir Topham Hatt, and Mr. Percival
 * Keith Wickham as Salty, Stafford, Skarloey, Den, and Dowager Hatt
 * Teresa Gallagher as Mavis, Annie, and Clarabel
 * Steven Kynman as Duck, Peter Sam, Paxton, Dart and a Slip Coach
 * Jonathan Forbes as Connor
 * Rebecca O'Mara as Caitlin and a Slip Coach
 * Togo Igawa as Hiro
 * Ben Small as Charlie, Rheneas and Owen
 * Michael Legge as Luke
 * Miranda Raison as Millie
 * Jonathan Broadbent as Bill, Ben and a Slip Coach
 * Bob Golding as Stephen and Sidney
 * David Menkin as Porter
 * Glenn Wrage as Spencer, Rocky, Cranky, Gator's Driver and Sodor Steamworks Worker
 * Matt Wilkinson as Rusty
 * Olivia Colman as Marion
 * Maggie Ollerenshaw as Henrietta
 * Clive Mantle as Gator
 * Tim Whitnall as Timothy and Reg
 * Joe Mills as Oliver and Toad
 * Tom Stourton as Duncan
 * Jules de Jongh as Emily
 * David Bedella as Victor