
Greg Tiernan was the director of Thomas and Friends from 2009 to 2012. In the twelfth season, he worked as unit director for Nitrogen Studios. He began work directing the series after the CGI transition, taking over from Steve Asquith. He was replaced by David Baas when production was moved to Arc Productions in 2012. He is married to Nicole Stinn. He has been working in the animation industry for twenty-seven years. Tiernan is a fan of the Railway Series. So much in fact, that he owns a copy of both The Island of Sodor: Its People, History and Railways and Sodor: Reading Between the Lines. According to an interview with SiF, Greg Tiernan says he would like to remake Pop Goes the Diesel and Dirty Work. And, if it was his choice, he would reintroduce every character ever introduced. Tiernan was involved in the animation of "Happily N'Ever After", the last film George Carlin played a part in.

Thomas & Friends: The Birthday Express

Thomas & Friends: Big Bang Surprise

Thomas & Friends: Thomas & The Runaway Kite

Thomas & Friends: Go Go Thomas

Thomas & Friends: Splish, Splash, Splosh!

Thomas & Friends: Muddy Matters

Thomas & Friends: Merry Winter Wish

Thomas & Friends: Rescue on the Rails

Thomas & Friends: Creaky Cranky

アダムス・ファミリー2 アメリカ横断旅行!

Thomas & Friends: The Lion of Sodor

Thomas & Friends: Schoolhouse Delivery

きかんしゃトーマス 伝説の英雄

きかんしゃトーマス

アダムス・ファミリー

Thomas & Friends: Blue Mountain Mystery

Thomas & Friends: Spills & Thrills

Thomas & Friends: Day of the Diesels

Thomas & Friends: Pop Goes Thomas

Thomas and Friends: Up Up & Away!

Thomas & Friends: A Very Thomas Christmas

ソーセージ・パーティー

きかんしゃトーマス ミスティアイランド レスキュー大作戦!!

Thomas & Friends: Merry Christmas, Thomas!

Thomas & Friends: Thomas and the Runaway Kite

Thomas & Friends: Muddy Matters