Character Relationship Map: X: The Unknown

Characters

• Dr. Adam Royston (played by Dean Jagger) — protagonist

  A scientist from the Atomic Energy Laboratory, Royston is called to investigate the radioactive explosion and the mysterious Y-shaped crack. He develops the theory explaining the ancient creature's be...

• Inspector McGill (played by Leo McKern) — supporting

  Known as Mac McGill, he oversees security for the UK Atomic Energy Commission and joins Royston's investigation. McGill provides practical support while Royston develops the scientific explanation, ac...

• Peter Elliott (played by William Lucas) — supporting

  Royston's colleague, Peter Elliott volunteers to be lowered into the seemingly bottomless crack to investigate the phenomenon. He encounters the deadly unseen horror but is rescued in time, and later...

• Sgt. Harry Grimsdyke (played by Michael Ripper) — supporting
• John Elliott (played by Edward Chapman) — supporting
• Maj. Cartwright (played by John Harvey) — supporting
• Pvt. Lansing (played by Kenneth Cope) — supporting
• Willie Harding (played by Michael Brooke) — supporting
• Lt. Bannerman (played by Peter Hammond) — supporting
• LCpl. 'Spider' Webb (played by Anthony Newley) — supporting
• Pvt. Haggis (played by Ian MacNaughton) — supporting
• Willie's Nurse (played by Stella Kimball) — minor
• Hospital Superintendant (played by Max Brimmell) — minor
• Vi Harding (played by Jane Aird) — minor
• The Vicar (played by Brown Derby) — minor
• Ian Osborn (played by Frazer Hines) — minor
• Jack Harding (played by Jameson Clark) — minor
• Russell (played by Neil Wilson) — minor
• Harry, the amorous intern (played by Neil Hallett) — minor
• Zena, the amorous nurse (played by Marianne Brauns) — minor

Story Analysis

A scientific team battles a primordial radiation-hungry entity emerging from a Scottish fissure.

Plot Progression

1. Anomaly in the Highlands — A military drill turns deadly when a radiation explosion reveals a bottomless fissure. Experts arrive to investigate, but unexplained deaths and a melting doctor escalate the terror.
2. Descent into the Abyss — Military attempts to contain the threat fail as soldiers die guarding the site. Peter Elliott volunteers to descend into the pit, narrowly surviving an encounter with the unseen entity.
3. Theory and Preparation — Scientists deduce the creature is a primordial organism drawn to radiation by tidal cycles. The team formulates a plan to track and neutralize the approaching blob using cobalt bait.
4. Final Confrontation — Peter drives the bait to lure the creature into a trap. The entity is destroyed in a massive explosion, but a secondary blast hints at lingering dangers as the team advances.