Irwin Allen directs the Lost in Space pilot in a rare color shot. Meanwhile, the cast shows a little humor

Irwin Allen directs the pilot of Land of the Giants

Details from Don Marshall's contact sheets 

Irwin Allen on the Time Tunnel set, directing Rendezvous with Yesterday

Irwin Allen directs David Hedison in the pilot episode of Voyage to the Bottom of the Sea,  Eleven Days to Zero. Captain Crane sneaks down the ladder and is caught by the crew, who pull him off the ladder.

Irwin Allen on the Set of Voyage to the Bottom of the Sea

Samples of Irwin's Script from the pilot, showing his revisons

Assorted shots of Irwin Allen on the sets of Beyond the Poseidon Adventure

Irwin Allen directs the action sequences on the set of The Towering Inferno:
 

Irwin Allen on the Set of The Swarm:

Irwin Allen signed index card. With many thanks to Linda Delaney for this item.