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Mark Roberts (June 9, 1921 - January 5, 2006) was an American stage, film and television support actor who appeared in over 100 films between 1938 and 1994, according to the Internet Movie Database. Sometimes he was credited as Bob Scott, Robert E. Scott, or Robert Scott. He is survived by his three children. Description above from the Wikipedia article Mark Roberts, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Spontaneous Combustion
as Dr. Simpson

Meet the Munceys
as Charles Vanderplas

L.A. Law
as Martin Haley

Murder, She Wrote
as Dr. Lyle Rush

Highway to Heaven

Return to Earth

Once Is Not Enough
as Rheingold

Posse
as Mr. Cooper

The F.B.I. Story: The FBI Versus Alvin Karpis, Public Enemy Number One
as Aide #2

The Rockford Files
as Hillman Stewart

The Affair
as Howard

Welcome Home, Johnny Bristol
as Mr. Bristol
The Partners

Cannon

The Brotherhood of the Bell
as DA Avery Hazelton (uncredited)
My Friend Tony

The Money Jungle
as Joe Diguseppe

Ironside

The Invaders
as Dr. Sam Larousse

That Girl

The F.B.I.
as Howard Schaal

The Outer Limits
as Bob Conner

Surfside 6

The Brothers Brannagan
as Bob Brannagan

Hawaiian Eye

Philip Marlowe

Adventures in Paradise
as Ralph Harris

One Step Beyond
as Pete Rankin

Onionhead
as Lt. J.G. Bennett

77 Sunset Strip

Yancy Derringer
as Matthew Younger

Perry Mason
as Bob Kimber

Richard Diamond, Private Detective
as Rod Leighton

One Coat of White
as Bill

Made in Heaven
as Mr. Tennant
State Trooper
A Date With Life

Cheyenne

Gunsmoke
as Adams

The Millionaire
as Bob Harris

Lassie

Letter to Loretta
as Greg Hite

Taxi
as Jim Turner

The Unknown Man
as Reporter (uncredited)
Miss Susan
as Bill Carter

Robert Montgomery Presents

The Blonde Bandit
as Airplane Mechanic
The Front Page
as Hildy Johnson

Suspense
as Dr. Joseph Parker

Studio One
as David Thorpe

The Philco Television Playhouse

Shed No Tears
as Ray Belden

The Invisible Wall
as Bellhop (uncredited)

Exposed
as William Foresman III (as Robert Scott)

Prairie Raiders
as Bronc Masters (as Robert Scott)

Kraft Television Theatre
as Pete Redfield

It's a Wonderful Life
as Mickey (uncredited)

Shadowed
as Mark Bellaman (as Robert Scott)

Cowboy Blues
as Jerry Winston (as Robert Scott)

The Unknown
as Reed Cawthorne (as Robert Scott)