|This article is about 'the mountain engine'. You may be looking for 'the magazine story'.|
Culdee was built at the Swiss Locomotive and Machine Works in Winterthur, Switzerland, and arrived on Sodor in time for the railway's inspection. In March 1900, he was the first to be used in the test runs on the Culdee Fell Railway. When Lord Harry was delivered in March 1962, Culdee left for overhaul instead of Shane Dooiney as he was the most run down of the two. He arrived back on Sodor in May 1963, which is where the first story of Mountain Engines begins.
Culdee is careful, cautious and friendly. He is filled with advice to give to the other engines. Culdee is the sensible one of the Mountain Railway. He and his coach, Catherine are a fine team, and favourites with passengers. But he does like a bit of excitement, and tells great stories about the other engines.
Culdee is painted purple with orange lining. The number "4" is painted on the sides and back of his cab in yellow and he has red nameplates, with his name in gold on the sides of his tanks.
- The Railway Series: Surprise Packet reveals that Culdee's driver's name is Joe.
- Though not making an appearance in the TV series, he is mentioned by a parent in an interview on the 10 Years of Thomas VHS/DVD.
- Culdee has buffers in some magazine stories and on his Take Along and Take-n-Play toys.
- In Sudric, "Culdee" translates as "Companion of God". The real life origin of the term comes from members of Christian monastic and eremitical communities of Ireland, Scotland, and England in the Middle Ages who were called "Culdees", which means "client/companion of God".
- Like the other mountain engines, Culdee is equipped with a face at each end.