Guest Stars Alan Baxter as Col. Grover Harry Townes as Dr. Clifford Scott Jeff Corey as Mr. Byron Lomax Peter Breck as Senator Jeremiah Orville Robert Benevides as Capt. James Harrison C. Lindsay Workman as Dr. Anderson Jason Wingreen as O.B.I.T. Operator Konstantin Shayne as Dr. Philip Fletcher Joanne Gilbert as Barbara Scott Sam Reece as Clyde Wyatt Uncredited William Douglas as The Helosian Steve Carruthers as Hearing Member
