The story includes mild spoilers from the Season 4 premiere of HBO’s The Righteous Gemstones. The Righteous Gemstones fans tuning in for the Season 4 premiere may be doing a double take or checking the menu to make sure they’ve got the right show as Danny McBride’s HBO televangelist comedy kicked off its

I sent him the script and he called me back pretty quickly,” McBride tells PEOPLE before explaining what happened next

"I never thought we’d get a guy of his stature to wear a period piece wool costume in 90 degree weather for 10 days straight," McBride says of casting his surprise Civil War set final season opener. "And for no money.