Professor Norman Wedgwood and his team are planning another rocket mission to the Moon. Once again, Geoff, Valerie and Jimmy are on hand to witness the launch of a new rocket MR1, along with journalist friend Conway Henderson. However, when the automatic supply ship MR2 fails to launch Henderson and the children make a desperate rescue attempt with Jimmy's pet Hamlet.
as Professor Norman Wedgwood
as Dr O'Connell
as Conway Henderson
as Geoffrey Wedgwood
as Valerie Wedgwood
as Jimmy Wedgwood
as Professor Mary Meadows
as Jean Cary
as Ian Murray
as John Field
as Michael Kennedy
