|This article is about 'the digital download release'. You may be looking for 'the series'.|
Season 18 is a Digital Download release available to view on Amazon Instant video and iTunes, featuring 20 episodes from the eighteenth series in their original PBS broadcast format. Each block contains a song and a Mr. Perkins' Railway segment.
Thomas is back and it's bigger and better than ever. We catch up with Thomas and his friends as well as some of the newer characters from series 18 like Gator and Marion. Timothy works with Bill and Ben at the China Clay Pits and Reg the scrapyard crane has fun at the Scrapyard.
- Fast & Reliable - Old Reliable Edward, Song: On a Journey Today, Mr. Perkins' Railway: Different Diesels and Not So Slow Coaches
- There's Always a Good Explanation - Flatbeds of Fear, Song: Searching Everywhere, and Disappearing Diesels
- Special Friends - Toad's Adventure, Song: Hey, Hey Thomas! and Duck and the Slip Coaches
- Please be Patient! - Thomas the Quarry Engine, Song: On a Journey Today and Duck in the Water
- Signals & Alarms - Signals Crossed, Song: Hey, Hey Thomas! and Thomas and the Emergency Cable
- Going Underground - Marion and the Pipe, Song: Let's Be Brave and Missing Gator
- Christmas Cheer! - Duncan the Humbug, Song: It's Christmas Time, Mr. Perkins' Railway: Who Works on the Railway and The Perfect Gift
- Passengers - Duncan and the Grumpy Passenger, Song: Working Together Again, Mr. Perkins' Railway: Different Sizes and Spencer's VIP
- Illuminating Minds - No Steam Without Coal, Song: Monsters Everywhere and Toad's Bright Idea
- Coming Home for Christmas - Last Train for Christmas, Song: It's Christmas Time and Long Lost Friend
- The final six episodes of the series are not featured. They instead appear on Season 19 digital download because they were supplied to most television networks as part of the nineteenth series.