https://www.metv.com/stories/what-made-perry-mason-an-international-success

"No show has a more enthusiastic cast."

William Hopper refused the role of Paul Drake when he auditioned for Perry Mason (https://www.metv.com/stories/william-hopper-refused-the-role-of-paul-drake-when-he-auditioned-for-perry-mason)

"I had no intention of doing it," said Hopper.