Pamela Barney

饰：Professor Mary Meadows

Hester Cameron

饰：Margaret Henderson

Astor Sklair

饰：John Field

乔治·库鲁里斯

George Coulouris

饰：Harcourt Brown,6 episodes, 1960-1961, / ...

Gerald Flood

饰：Conway Henderson,6 episodes, 1960-1961,

Peter Williams

饰：Professor Wedgwood,1 episode, 1960,

Maurice Durant

饰：Hammond,1 episode, 1960,

Alan Barry

饰：Technician,1 episode, 1960,

Stewart Guidotti

饰：Geoffrey Wedgwood,6 episodes, 1960-1961,

Hugh Evans

Hugh Evans

饰：Ian Murray,4 episodes, 1960-1961,

伯纳德·霍斯福尔

Bernard Horsfall

饰：Professor Hawkins,2 episodes, 1960,

Lisa Peake

Lisa Peake

饰：Peruvian,1 episode, 1961,

Ian Sadler

饰：Doctor,1 episode, 1960,