Thomas is released from Her Majesty's care to find that Sally has left the area with another man, and is now pregnant.
Probationer Thomas is handed the unenviable task of instructing a group of young offenders in motor mechanics.
Thomas leaves Samantha collecting her own tickets as he sets about a sticky adventure of his own.
There's excitement as construction workers uncover an ancient bone, believed to date back to Viking times.
Thomas is set to drive a lorry-load of engineering samples to Budapest, with Lively as his co-driver: disaster strikes when the lorry is stolen.
British diplomat Isabel Stevens uses her influence to get Thomas released from a Hungarian prison cell.
Fresh from his escapades in Hungary, Thomas returns to find the future of the Steam Museum hanging in the balance due to financial problems.
Thomas is taken back to the sixties when an old friend turns up unexpectedly - And ends up causing him considerable aggro.
Thomas tries desperately to patch things up with Jo, while Lively stumbles across a buried steam engine...
Thomas is offered an expenses-paid trip to a villa in Tuscany, but as he and Jo arrive they are greeted by armed Italians,