Caroline John. Caroline John was 53 in The Zero Imperative as 'Dr. Elizabeth Shaw'.
Jon Pertwee. Jon Pertwee was 74 in The Zero Imperative as 'Dr. Jeremiah O'Kane'.
Sylvester McCoy. Sylvester McCoy was 50 in The Zero Imperative as 'Dr. Colin Dove'.
Colin Baker. Colin Baker was 50 in The Zero Imperative as 'Peter Russell'.
Mark Gatiss. Mark Gatiss was 27 in The Zero Imperative as 'Dr. William Bruffin'.
Louise Jameson. Louise Jameson was 42 in The Zero Imperative as 'Patricia Haggard'.
Sophie Aldred. Sophie Aldred was 31 in The Zero Imperative as 'Public Relations Officer'.
Linda Lusardi. Linda Lusardi was 35 in The Zero Imperative as 'Louise Bayliss'.
David Terence. David Terence was >> in The Zero Imperative as 'Daniel O'Kane / Eustace O'Kane'.Nicola Fulljames. Nicola Fulljames was >> in The Zero Imperative as 'Dr. Beatrice Hearst'.Patricia Merrick. Patricia Merrick was >> in The Zero Imperative as 'Dr. Julie Gilchrist'.
Jonathan Rigby. Jonathan Rigby was 30 in The Zero Imperative as 'Cummings'.
Alexander Kirk. Alexander Kirk was 31 in The Zero Imperative as 'Orderly'.Daniel Mills. Daniel Mills was >> in The Zero Imperative as 'Ghostly Child Voice'.
Peter Davison. Peter Davison was 42 in The Zero Imperative as 'Patient One'.
Mark Ayres. Mark Ayres was >> in The Zero Imperative as 'Original Music Composer'