The Boy from Mercury
Distribution
Johnny Ward
Classroom Schoolboy
Sean Flanagan
Sean McCarthy
Rita Tushingham
May Cronin
Charles Middleton
Ming the Merciless (Archive Footage)
Hugh O'Conor
Paul
Ian McElhinney
Brother Dowdall
Van Johnson
Game Show Contestant (Archive Footage)
Buster Crabbe
Flash Gordon (Archive Footage)
Tom Courtenay
Uncle Tony Cronin