Eight years ago, Gavin, the artistic son of a Scots-Italian ice-cream dynasty, turned his back on Glasgow and moved south to London to make his name illustrating children's books. Now, frustrated and broke, his Uncle Sal appears with an offer. Gavin's father has sold the family business and to get his share of the proceeds, Gavin must return home for his father's birthday party. Swayed by the money, he sets off north and picks up a hitchhiker with a secret. Their journey is difficult but ultimately rewarding.
| Actor | Role |
|---|---|
 Peter CapaldiGavin Bellini | Gavin Bellini |
| EElaine CollinsYvonne | Yvonne |
 Richard WilsonUncle Salvatore | Uncle Salvatore |
 Jeremy NorthamJohn | John |
 Frances BarberMiss Trumble | Miss Trumble |
 Simon CallowEddie Cherdowski | Eddie Cherdowski |
 Phyllis LoganKarla | Karla |
 Robert JamesCampbell | Campbell |
| AAnn Scott-JonesMrs. Tutty | Mrs. Tutty |
 Lindy WhitefordPeggy | Peggy |
 Michael NardoneStevie | Stevie |
| BBilly McCollKevin the Guru | Kevin the Guru |
 Clive RussellClegg | Clegg |
 Catherine RussellAnimal Rights Activist | Animal Rights Activist |
 Peter FerdinandoHomeless Youth | Homeless Youth |
| SScott HallMr. Young | Mr. Young |
 Andrew DownieBrodie | Brodie |
| BBill GavinMan in Tiny Car | Man in Tiny Car |
 Sophie HallNancy | Nancy |
| KKate HardingRadio Voices | Radio Voices |