Pamela Barney

饰：Professor Mary Meadows

Hester Cameron

饰：Margaret Henderson

Brigid Skemp

饰：Venusian Child

乔治·库鲁里斯

George Coulouris

饰：Harcourt Brown,8 episodes, 1961,

Gerald Flood

饰：Conway Henderson,8 episodes, 1961,

Astor Sklair

饰：John Field,3 episodes, 1961,

Graydon Gould

饰：Captain Wilson,8 episodes, 1961,

Bob Bryan

Bob Bryan

饰：The Venusian,3 episodes, 1961,

Robert James

饰：Colonel Korolyov,1 episode, 1961,

Stewart Guidotti

饰：Geoffrey Wedgwood,8 episodes, 1961,

Hugh Evans

Hugh Evans

饰：Ian Murray,3 episodes, 1961,