John McKennon, a former FBI agent who runs Intertect, an international investigative agency, is followed as he tackles various assignments.
| Actor | Role |
|---|---|
 Stuart WhitmanJohn McKennon | John McKennon |
 Pamela FranklinAmanda Hollister | Amanda Hollister |
 David SoulCurt Lowens | Curt Lowens |
 Bernard FoxBarrett | Barrett |
 Eric BraedenEmhardt | Emhardt |
 Robert ReedBlake Hollister | Blake Hollister |
 Sherry AlberoniSylvia Doyle | Sylvia Doyle |
 Bo SvensonNot listed | Not listed |