Robert Knapp

Mesa of Lost Women

(Grant Phillips)

Scandal Incorporated

(Jess Blanchar, tabloid reporter)

Fixed Bayonets!

(Chuck (uncredited))

Screaming Eagles

(Co-Pilot)

Revolt at Fort Laramie

(Lt. Chick Waller)

Gunmen from Laredo

(Gil Reardon)

Tomahawk Trail

(Pvt. Barrow)

Hot Car Girl

(Det. Lt. Ryan)

Outlaw's Son

(Striker)

Silent Raiders

(Lt. Finch)

The Rawhide Trail

(Farley Durand)

The Threat

(Steve Keenan)

The Stoolie

(Big daddy at pool (as Robert 'Big Daddy' Knapp))

Strange Fascination

(Jack)

Black Saddle

(Emory Parsons)

Behind Closed Doors

(Fred Lang)

Adam-12

(Sgt. Casey)

The Invaders

(Congressman Joe Bonning)

The Invaders

(Lt. Col. Howell)