Mark Roberts

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.
Cast

Gilda
Gabe Evans

Posse
Mr. Cooper

The Unknown
Reed Cawthorne (as Robert Scott)

One Mysterious Night
George Daley

Shed No Tears
Ray Belden

Shadowed
Mark Bellaman (as Robert Scott)

The Crime Doctor's Courage
Bob Rencoret (as Robert Scott)

Exposed
William Foresman III (as Robert Scott)

The Unknown Man
Unknown

Meet the Munceys
Charles Vanderplas

Welcome Home, Johnny Bristol
Mr. Bristol

Taxi
Jim Turner

Once Is Not Enough
Rheingold

It's a Wonderful Life
Mickey (uncredited)

Prison Ship
Maj. Trevor

The Notorious Lone Wolf
Dick Hale (as Robert Scott)

The Invisible Wall
Bellhop (uncredited)

Prairie Raiders
Bronc Masters (as Robert Scott)

The Escape
MIckey

Brother Rat
Tripod Andrews

Black Arrow
Black Arrow (as Robert Scott)

Spontaneous Combustion
Dr. Simpson
Out of the Depths
'Pills' Wilkins

The Blonde Bandit
Airplane Mechanic

Cowboy Blues
Jerry Winston (as Robert Scott)

The Money Jungle
Joe Diguseppe

Ten Cents a Dance
Ted Kimball, III (as Robert Scott)

Return to Earth
Unknown

The Affair
Howard

The Brotherhood of the Bell
DA Avery Hazelton (uncredited)

The Bandit of Sherwood Forest
Robin Hood's Man (as Robert E. Scott)

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

Those Were the Days!
Allison

Made in Heaven
Mr. Tennant

One Coat of White
Bill