Butler and Robinson have to track down a saboteur at an atomic research station before it is too late.
| Actor | Role |
|---|---|
 Donald ChurchillRobinson | Robinson |
 Miranda ConnellIsobel Gille | Isobel Gille |
 Frank GatliffDr. Kendrick | Dr. Kendrick |
 John GregsonButler | Butler |
| PPatrick McAlinneyDiamond | Diamond |
 Stanley MeadowsDr. Norman Jones | Dr. Norman Jones |