Lost Continent

Maj. Joe Nolan

Marla Stevens

Lt. Danny Wilson

Michael Rostov

Native Girl

Stanley Briggs

Robert Phillips

Air Police Sergeant

Simmons (as William Gren)

Officer at Proving Grounds (uncredited)

Officer at Proving Grounds (uncredited)

Naval Captain (uncredited)

Bunker 'Suit' (unconfirmed) (uncredited)

Officer at Proving Grounds (uncredited)

The opening shot of the White Sands Missile Base, and some of the rocket scenes, were lifted from Rocketship X-M (1950) which, like this film, had also been released by Lippert Pictures.

Shot in 11 days.

The original green tint of the "lost continent" sequences was not reproduced for television prints of the film (the sequences were shown in black-and-white instead), and it was not until well over 30 years after the film's initial release that the tint was restored for home video in the late 1980s.

The Triceratops and Brontosaurus are portrayed as vicious killers that attack without provocation. In reality both were plant eaters that probably attacked others only in self-defense.

The cast is in an Air Force C-47. When they land for fuel, a Boeing 247 airliner is shown taxiing in.

When the plane loses power and starts to go down, the men seated on the port side of the cabin are shown clinging to their seats against the angle of descent, the tail end on the left higher than the nose on the right. (This is also consistent with the shot of the cockpit from the starboard side, showing the angle of the plane high on the left, toward the tail, sloping down to the nose to the right.) The shot of the men on the starboard side of the cabin should show the same angle of descent in reverse: the plunging nose on the left, the higher tail on the right. But instead, the shot of the starboard side shows the same tilt as the port side - higher tail on the left, lower nose on the right - which, taken literally, would mean the starboard side of the plane was plummeting to the ground in the opposite direction of the port side.

Nolan: Look at the size of that footprint! I've never seen anything like it before!