One by one members of a special project team are being killed by telekinesis - the ability to move things with the power of the mind alone. The race is on to determine which of the remaining team members is the murderer and to stop them.
| Actor | Role |
|---|---|
 George HamiltonJim Tanner | Jim Tanner |
 Suzanne PleshetteMargery Lansing | Margery Lansing |
 Richard CarlsonN. E. Van Zandt | N. E. Van Zandt |
 Yvonne De CarloSally Hallson | Sally Hallson |
 Earl HollimanTalbot Scott | Talbot Scott |
 Gary MerrillMark Corlane | Mark Corlane |
 Ken MurrayGrover | Grover |
 Barbara NicholsFlora | Flora |
 Arthur O'ConnellHenry Hallson | Henry Hallson |
 Nehemiah PersoffCarl Melnicker | Carl Melnicker |
 Aldo RayBruce | Bruce |
 Michael RennieArthur Nordlund | Arthur Nordlund |
 Miiko TakaMrs. Van Zandt | Mrs. Van Zandt |
 Celia LovskyMrs. Hallson | Mrs. Hallson |
 Vaughn TaylorMr. Hallson | Mr. Hallson |
 Lawrence MontaigneBriggs | Briggs |
 Beverly PowersSylvia | Sylvia |