Stepney Gets Lost is the thirteenth episode ever made in Season 5.
Stepney is bored on the Bluebell Railway, so he is naturally eager when allowed to help at the quarry. However, Stepney forgets the Fat Controller's warnings to be home before nightfall and takes a special train down the branch line. Toby and Mavis warn Stepney to be careful and Stepney leaves the quarry with the special train. After delivering the train, Stepney then heads home, but takes the wrong turn after fog descends and ends up in the scrapyards. His crew goes for help, but in their absence, 'Arry and Bert creep up and take him to the smelter shed, where Stepney is shunted underneath a giant grabber. It looks like the end for the little tank engine, but the Fat Controller arrives in the nick of time and has the grabber shut down. The Fat Controller then sends Stepney back to the Bluebell Railway and Stepney learns that there is no place like home.
- The camera shot looking over a beam and down at Stepney is differently-configured with scattered objects when 'Arry and Bert approach.