Rusty enjoys visiting the Bluebell Railway, but his driver is concerned that the line needs an engine, so Rusty consults with Douglas about finding one on the Other Railway. Douglas mentions that only diesels travel there nowadays, which is where he found Oliver. That suits Rusty and the next day he travels to the Other Railway, slipping past the diesels by fibbing that he is an inspection diesel. He finds a tank engine named Stepney alone in a siding, and he asks him if he likes bluebells. Stepney replies puzzledly that he believes bluebells are beautiful, and Rusty promises to help him run away. Their drivers agree and Rusty helps him to escape to Sodor. Thanks to Rusty, Stepney now happily runs on the Bluebell Railway.
In the US version, music is heard when Stepney says, "and my friend, Rusty. I wouldn't be here if it weren't for Rusty!" but is absent in the UK and international versions.
In the UK and international versions, Henry and Gordon whistle to Rusty when he is heading to the Other Railway; the whistle sound effects are omitted in the US version.
Scrap models of Thomas, Gordon, and Donald/Douglas can be seen on the Other Railway.
The engines of the Other Railway are represented by Diesel, BoCo, Daisy, Mavis, and The Diesel, all facing opposite to the camera.
This episode marks Diesel's only appearance in the fourth season.
In the UK and international versions, Thomas has Edward's whistle sound as he passes through Bluebell Valley Station. In the same scene, Clarabel is also facing the wrong way.
In the UK and in various international versions, when Rusty and Stepney return, Thomas, Gordon, and James' whistle sounds are heard, yet they are nowhere to be seen. This is because stock audio of the engines whistling is reused from the first season episode, Thomas' Christmas Party.
Rusty's truck and brake van disappear in the close-up shot of his driver in his cab.
When Rusty says "Right, we'll find one tomorrow," he has dried-up glue around his face.
When Rusty first arrives on the Other Railway, some chains are hanging beside the signal box, but when Rusty says "Oh, what's that?" the chains disappear.
The tar wagon seen between BoCo and Daisy disappears in the last shot of the Other Railway.
On the Other Railway, the diesels constantly change places:
When Rusty first arrives, Mavis is to his right.
When the voice calls out, "Who are you?" Mavis has somehow moved behind Diesel.
In the shot after Rusty says, "Then I'll just go and inspect," Mavis is back to her original position, Diesel has somehow moved in front of her, and the Diesel appears in front of BoCo.
In the shot of Rusty escaping from his point of view, Mavis is on Daisy's track.
In the following shot, Daisy is on the far right track, and the Diesel has somehow moved to the smaller shed. Additionally, Mavis and Diesel have moved to the narrow gauge track.
In the final shot of the Other Railway, Daisy and the Diesel are back in their original positions.
When Rusty escapes, he passes BoCo. In the next shot, he passes a shed he already should have passed.
When Rusty and Stepney escape, Rusty's cab roof appears to be snapped.
When Rusty and Stepney leave the scrapyard, Diesel and Mavis can be seen placed on narrow gauge rails.
When Stepney and Rusty are on the Standard and Narrow Gauge Viaduct, the house and shed next to the track have moved compared to when Rusty went over the viaduct the first time.