Trailer
Images
 | Tom Baker as The Doctor |
 | Elisabeth Sladen as Sarah Jane Smith |
 | Tony Beckley as Harrison Chase |
 | Kenneth Gilbert as Richard Dunbar |
| Michael Barrington as Sir Colin Thackeray |
| Sylvia Coleridge as Amelia Ducat |
 | John Challis as Scorby |
 | Mark Jones as Arnold Keeler / Krynoid (voice) |
| Seymour Green as Hargreaves |
| Michael McStay as Derek Moberley |
| Hubert Rees as John Stevensen |
| John Gleeson as Charles Winlett |
| Ian Fairbairn as Doctor Chester |
| John Acheson as Major Beresford |
| Ray Barron as Sergeant Henderson |
 | Alan Chuntz as Chauffeur |
| David Masterman as Guard Leader |
| Harry Fielder as Guard |
 | Pat Gorman as Guard |
| Ian Elliott as Guard |
| Keith Ashley as Sir Colin's Aide |
| Ronald Gough as Marine |
| Patrick Milner as Marine |
| Barry Summerford as UNIT Soldier |
| Tony Snell as UNIT Soldier |
| Patrick Ginter as UNIT Soldier |
| Rowland Geall as UNIT Soldier |
| Derek Wayland as UNIT Soldier |
| Keith Ashley as The Krynoid |
| Ronald Gough as The Krynoid |
| Directing | |
| Douglas Camfield | Director |
Writing | |
| Robert Banks Stewart | Writer |
| Robert Holmes | Script Editor |
Production | |
| Philip Hinchcliffe | Producer |
Editing | |
| M.A.C. Adams | Editor |
Sound | |
| Geoffrey Burgon | Original Music Composer |
Art | |
| Jeremy Bear | Production Design |
Costume & Make-Up | |
| Ann Briggs | Makeup Artist |
Visual Effects | |
| Richard Conway | Visual Effects |
Lighting | |
| John Dixon | Lighting Director |
Production | |
| George Gallaccio | Production Manager |
| Graeme Harper | Production Assistant |
Sound | |
| John Holmes | Sound |
Lighting | |
| Clive Potter | Lighting Technician |
Sound | |
| Vic Godrich | Sound |
Camera | |
| Keith Hopper | Camera Operator |
Costume & Make-Up | |
| Barbara Lane | Costume Design |
Crew | |
| Dick Mills | Special Sound Effects |
Art | |
| Roger Murray-Leach | Production Design |
Crew | |
| Terry Walsh | Fight Choreographer |
Sound | |
| Delia Derbyshire | Theme Song Performance |
