Paul Maxwell

Paul Maxwell (born Maxim Popovich; November 12, 1921 – December 19, 1991) was a Canadian actor who worked mostly in British cinema and television, in which he was usually cast as American characters. [biography (excerpted) from Wikipedia]
Cast

Indiana Jones and the Last Crusade
Panama Hat

City of Fear
Mike Foster

It!
Jim Perkins

A Bridge Too Far
Maj. Gen. Maxwell D. Taylor

Rustlers' Rhapsody
Sheepherder No. 1

Follow the Boys
C.M.A.A.

The Haunting
Bud Fredericks (uncredited)

Madame Sin
Connors

Submarine Seahawk
Lt. Cmdr. Bill Hallohan

Spy Story
Submarine Captain

The Return of Sherlock Holmes
Agent Hopkins

Freedom to Die
Craig Owen

The Man Outside
Judson Murphy

Marcus Welby, M.D.: A Holiday Affair
Dr. Wallace

Death in Small Doses
Doctor (uncredited)

The Man Who Lived at the Ritz
Mylos

Sleepers
Barrington Cabot

Aliens
Van Leuwen

Strong Medicine
Mace
Cry Wolf
Dr. Jack Russell

The Looking Glass War
CIA Man

Cloud Waltzing
Andrew Tolliver

Intrigue
Esterbrook

Baxter!
Mr Baxter

The Vision
Bill Freed

Shadow of Fear
Bill Martin

The Pink Panther Strikes Again
CIA Director

The Last Days of Patton
Lt.Gen. Geoffrey Keyes

We Joined the Navy
Commander Spelling U.S.N.

How to Make a Monster
Jeffrey Clayton

And No One Could Save Her
Paul

Man in the Middle
Major Smith

Thunderbirds Are GO
Captain Paul Travers (voice)

Shadow of Fear
Unknown

Perry Mason: The Case of the Desperate Deception
Capt. Calvelli

This Is Supermarionation
Steve Zodiac / Captain Grey (voice)

Blood of Dracula
Mike, assistant coroner

Revenge of the Mysterons from Mars
Captain Grey / Breck (voice)

Captain Scarlet vs. The Mysterons
Captain Grey / World President / Fire Chief (voice)
The Naked Sun
Elijah Baley