|Railway Series Portrait|
|Position||Fourth Arlesdale Railway steam engine|
|Age||35 (as of 2011)|
|Arrived on Sodor||Unknown|
In Harvest Season, a lorry was being rude to Jock about the farm produce being taken by road and later got his mind when he is stuck in a traffic jam due to a road accident. Jock was stopped by the lorry so that the lorry's fresh fruit and vegetables can be moved to market without being rotten or not fresh enough when the lorry tries to make it. The lorry apologized to Jock for teasing and with Bert, the two engines double-headed a farm produce train along the Arlesdale Railway.
In Ruffled Feathers, Jock made it but nearly had Sheffield's train missed by a quarter of an inch out of the station as Sheffield was waiting for Jock to arrive with his passengers. The new tank engine said to be more quicker in time without him leaving the station with no passengers sitting down in his two coaches.
He makes a cameo appearance in the seventh episode, Rough Start. In Cold Reception, Jock was helping some workmen with an unusual load on his flatbeds. He then told Olivia that the local charity is coming for a gala this weekend on the Arlesdale Railway and told her about the charity's aims to the gala that week. He also told her that those were the sponsors for the gala before Olivia told him about her former railway doing these local charities made by her supervisor, Sir Walter Albworth. He later said about what to expect in the next few days leading up to the gala. She spotted another local sponsor and Jock told her that it was coming from London, supervising the British Isles' economy. The last bit of it was the sponsors' aims were for the publicity of the general public having to be at this gala that weekend. Olivia then went off to turn around on the turntable near the Arlesdale Railway's ballast machine.
Jock is based on Northern Rock of the Ravenglass and Eskdale Railway.
- Season 5 - Harvest Season and Ruffled Feathers
- Season 1 STMY - Rough Start (cameo) and Cold Reception
- Season 2 STMY - Food for Thought, Storm Damage