Tommy Kirk as Dop - Martian Fellow #1 / Mr. Fast - Seattle Sun Reporter

Yvonne Craig as Dr. Bolen

Byron Lord as Col. Bob Page, U.S.D.S.

Roger Ready as Stimmons

Barnett Shaw as Man at Military Conference

Neil Fletcher as Secretary of Defense

Chet Davis as Network News Man

Ron Scott as

George Edgley as Planetarium Director

Dick Simpson as

Don Campbell as

Bob Hazlett as James, Gas Station Attendant

Ann Palmer as U.S.D.S. Tech

Gordon Bulow as

Bill Thurman as Drunk on Pier

Claude Earls as

Sally Casey as

Bob Lorenz as

Sylvia Rundell as

David England as Planetarium Manager

Terry Davis as

Warren Hammack as Martian Doctor / Fellow #2

Tony Huston as Martian Fellow #3

Larry Tanner as Martian Fellow #4

Patrick Cranshaw as Drunk #2 on Pier

Cal Duggan as Martian Fellow #5

Pat Delaney as Artist Abducted by Martians

Sherry Roberts as Brenda Knowlan, Abductee

Donna Lindberg as Stewardess Abducted by Martians

Bubbles Cash as Stripper Abducted by Martians

Larry Buchanan as Narrator of Planetarium Film (voice)