| Charles Coburn | Alexander Gow |
| Tom Drake | Robert Shannon |
| Hume Cronyn | Papa Leckie |
| Beverly Tyler | Alison Keith |
| Gladys Cooper | Grandma Leckie |
| Dean Stockwell | Robert Shannon |
| Selena Royle | Mama Leckie |
| Jessica Tandy | Kate Leckie |
| Richard Haydn | Jason Reid |
| Andy Clyde | Saddler Boag |
| Norman Lloyd | Adam Leckie |
| Robert North | Murdoch Leckie |
| Wallace Ford | Jamie Nigg |
| Eilene Janssen | Alison Keith |
| Richard Lyon | Gavin Blair |
| Henry O'Neill | Canon Roche |
| Henry Stephenson | Prof. Rattray Blakely |
| Norma Varden | Mrs. Bosomley |
After his parents die, young Irish lad Robert Shannon is forced to take residence with his extended family in Scotland. As he grows up, he develops and interest in medicine and harbors dreams of becoming a doctor and escaping his dead-end town. While his great-grandfather and other family members support him, he continually faces harsh criticism from his miserly grandfather, who refuses to support the boy's decision to leave town for college.
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