- Unknown:
- Jack Cox
- Reader:
- Basil Jones
- Play By:
- W. B. MacMillan
- Play By:
- Harold Ballantyne
- Produced By:
- Kathleen Garscadden
- Charlie Currie Mercury lift-man:
- Leonard Maguire
- Visitors to the Mercury office: Boy:
- Gordon MacDonald
- Visitors to the Mercury office: Girl:
- Joan Fitzpatrick
- J B Tweed, the Editor:
- Douglas Robin
- Steve Murray, chief reporter:
- Moultrie R. Kelsall
- Deadline Donovan, copy-boy:
- John Carlin
- Monty Lambert, author and naturalist:
- Lain Cuthbertson
- Patricia Lambert, his wife:
- Marjorie Dalziel
- Two far-travelled children: Ronnie Lambert:
- Pat Leckie
- Two far-travelled children: Ronnie Lambert Gay Lambert:
- Joan Fitzpatrick
- Hector Murdoch, a shepherd:
- Douglas Murchie
- Lord Twinstairs owner of the Mercury:
- Leonard Maguire
