After a government agent is murdered, McGarrett must identify the traitor in a scientific facility.
| Name | Type | Role | |
|---|---|---|---|
| John Melson | Writer | ||
| Harry Williams | Guest Star | ||
| Steve Kanaly | Guest Star | ||
| Maria Perschy | Guest Star | ||
| Vic Leon | Guest Star | ||
| Andrew Duggan | Guest Star | ||
| Wayne Oxford | Guest Star | ||
| Norman J. Perry | Guest Star | ||
| Jim Ferrier | Guest Star | ||
| Lani Kim | Guest Star | ||
| Jo Anne Morgan | Guest Star | ||
| John A. Hunt | Guest Star | ||
| Don Pomes | Guest Star | ||
| Bernard Ching | Guest Star | ||
| Barry Crane | Director |