Film

No.	Year	Title	Role	Vote Average
1	1959	Never Steal Anything Small	Ward (as John Duke)	80
2	1960	Pay or Die!	Lupo Miano (as John Duke)	72
3	1961	The Crimebusters	Hood	65
4	1962	Follow That Dream	Al (as John Duke)	62
5	1968	The Split	Maccione (uncredited)	67
6	1969	The Greatest Mother of 'em All	Gene Frazer	0
7	1971	Maybe I'll Come Home in the Spring	Doctor (uncredited)	56
8	1972	Man On A String	Carlo Buglione (as John Duke Russo)	70
9	1972	The Man	Haley	63
10	1973	The Don Is Dead	Don Aggimio Bernardo	60
11	1975	Hustle	Man in Phone Booth	57

Television

No.	Year	Title	Role	Vote Average
1	1957	Tombstone Territory	Jim Parker	60
2	1960	The Case of the Dangerous Robin	Teddy Thomas	0
3	1963	The Outer Limits	Dr. Terrell	78
4	1963	The Fugitive	Sergeant Endicot	72
5	1963	The Fugitive	Bus Driver	72
6	1966	Star Trek	Lt. Commander Giotto	80
7	1966	Star Trek	Commodore Wesley	80
8	1966	Mission: Impossible	Tiso Kastner	76
9	1967	The Invaders	Lt. Alvarado	68
10	1968	Hawaii Five-O	Abilleno	71
11	1968	Hawaii Five-O	Willy Vance	71
12	1968	Hawaii Five-O	Albert Jovanko	71
13	1968	Hawaii Five-O	Eddie Rizzo	71