"They're all following like sheep!"

Planet of the Daleks - Episode 7

Finney and the Doctor are being hunted down by the Daleks deep in the jungles of Skaro. As they flee an approaching Dalek patrol, the pair run into a giant dinosaur-like reptile, which promptly skewers a Dalek on one of it's horns, giving Finney an idea. The Dalek patrol promptly barbecue the beast with their exterminators, buying our heroes a little extra time to make their escape. Soon they find the rest of the reptile herd, giving Finney a chance to try out his idea...