Long before Dirty Harry, even before those spaghetti Westerns and Rawhide--heck, even before he sang in "Paint Your Wagon" (!!!), Clint Eastwood made his very first screen appearence in "Revenge Of The Creature" as a lab assistant working under John Agar's character, Clete Ferguson. In his scene, Clint discusses with Agar how he thinks one of four lab mice may have been eaten by the cat--until Clint accidently finds the missing rodent when he sticks his hand into the pocket of his lab coat. Jack Arnold, who directed "Revenge Of The Creature", also directed episodes of Eastwood's TV series Rawhide.