To Trap A Spy (1964) - You Might Have Taken That Man Alive

Joining a complex caper in which nameless espionage goons have penetrated a disguised Manhattan entrance to some modern agency, we see them nearly get past William Marshall (later known as “Blacula”) at the elevators, before they encounter Ilya (David McCallum), Napoleon Solo (Robert Vaughn) and their boss Allison (Will Kuluva), early in the sort-of TV pilot, then the delayed first feature film in the The Man From U.N.C.L.E. franchise, To Trap A Spy, 1966.