Character Relationship Map: They Nest

Characters

• Dr. Benjamin Cahill (played by Thomas Calabro) — protagonist

  Main protagonist and emergency doctor. Forced to take a break due to stress, he investigates strange insect attacks on Orr Island, discovers the cockroaches' parasitic lifecycle, warns the townspeople...

• Sheriff Hobbs (played by Dean Stockwell) — protagonist

  Local law enforcement who initially requests Cahill's help with autopsy examinations. Later attacked and killed by the mutant insects after confronting Jack's brother Eamon.

• Jack Wald (played by John Savage) — supporting

  Local man who breaks into Cahill's home to vandalize it but is killed by the cockroach infestation. His body allows Cahill to discover the insects' internal nesting behavior.

• Nell Bartle (played by Kristen Dalton) — supporting

  Cahill's girlfriend. She assists in evacuating townspeople and children, helps rescue a missing pupil, and survives the insect swarm alongside the main group.

• Al Crump (played by Marcel Maillard) — supporting
• Eamon Wald (played by Tom McBeath) — supporting

  Jack's brother who leads a mob against Cahill and attacks Sheriff Hobbs. He is later killed during the town's failed evacuation attempt.

• Peggy Crump (played by Deb Pickman) — minor
• Henry S. Crump (played by Alexander Pollock) — minor
• Mrs. Hobbs (played by Jessica Schreier) — minor
• Lighthouse Keeper (played by Lloyd Berry) — minor
• Fisherman #1 (played by John Tierney) — minor
• Harbor Patrolman (played by D. Neil Mark) — minor
• Fisherman #3 (played by Garry Little) — minor
• Enoch Piper (played by Travis MacDonald) — supporting
• Mrs. Bartle (played by Rebecca Toolan) — minor
• Vinyl (played by Walter Marsh) — minor
• Johnnie Skee (played by Mark Schooley) — supporting

  A missing school pupil rescued by Cahill and Nell. His parents are found dead after the insects nest in a local barn.

• Fisherman #2 (played by Kenneth G. McIntyre) — minor
• Guy Barter (played by Lee Jay Bamberry) — supporting

  Local resident who attempts to free the imprisoned Sheriff Hobbs. Later joins Cahill, Nell, and Henry in fleeing the island by boat.

• Josiah Bean (played by Dean Wray) — supporting

Story Analysis

A doctor and sheriff confront a parasitic insect infestation that turns a quiet island community into a deadly survival scenario.

Plot Progression

1. Island Arrival & Strange Corpses — The story opens with the arrival on Orr Island and the initial examination of unusual animal and human corpses. Sheriff Hobbs commissions the investigation, setting the stage for the hidden threat.
2. Autopsy & Mob Backlash — The autopsy reveals the horrifying mechanism of the insects, but the truth triggers local paranoia. A violent mob forms, leading to the doctor's imprisonment and escalating town-wide hostility.
3. Basement Siege & Insect Revelation — Hobbs attempts to protect the doctor's property but is trapped and killed by the insects. The discovery of his body confirms the lethal reality of the infestation to the survivors.
4. Evacuation & Boat Escape — The survivors organize a desperate evacuation of the school and barn. A massive swarm forces the remaining locals to flee, culminating in a harrowing boat journey under heavy attack.
5. Mainland Ambiguity — The survivors ignite a fuel pump to destroy the swarm and are met by arriving military forces. The film ends with an ominous hint that at least one insect has reached the mainland.