as Gen. Sloan
as Assistant D.A. Louis D'Angelo
as Dr. Franticek Svoboda
as Brigadier General Clifton I. Garnet
as Joe McClure
as Prof. Bernard Quatermass
as Walter Williams
as (in "The Glass Key") (archive footage)
as Sen. William J. 'Bill' Stephens
as B.D. 'Big Deal' MacPherson
as Gen. Terry Arnold
as Tom 'T.P.' Paramutual
as Ed Bates
as Daniel 'Dan' McGinty
