A young train spotter heads to Staffordshire for a historic journey through a soon to be condemned tunnel. During his trip, he encounters a series of eccentric characters. With his passion for the railways and naïve disposition, Benjamin inadvertently encourages them to reveal their innermost fears and darkest secrets.
| Actor | Role |
|---|---|
 Richard O'CallaghanFowler | Fowler |
 Paul BrookeFarquhar | Farquhar |
| IIain ReidSmith | Smith |
| RRobert HartleyMcCullow | McCullow |
 John OwensCorporal | Corporal |
| BBill LyonsTruculent | Truculent |
| LLaurie AspreyBrian | Brian |
 Jonathan Burn2nd Lt. Florence | 2nd Lt. Florence |
 Noel DysonMrs. Dyson | Mrs. Dyson |
| CClaire DavenportMegs | Megs |
| VVictor PlattMr. Dyson | Mr. Dyson |
 Joe GladwinAdam Coulson | Adam Coulson |
| GGriffith DavisJackie Coulson | Jackie Coulson |
 John Le MesurierJudge Grayson | Judge Grayson |
| JJohn Scott MartinTicket Man | Ticket Man |
 Angela PleasenceBeatrice Grayson | Beatrice Grayson |
 Shelagh FraserMrs. Grayson | Mrs. Grayson |
| AAnthony KellyGardner | Gardner |
 Toke TownleyMr. Phillips | Mr. Phillips |
 Eileen WayMrs. Phillips | Mrs. Phillips |
| JJohn GrayBlondie | Blondie |