Top billed cast: Charlie Day, Glenn Howerton, Rob Mac, Kaitlin Olson, Danny DeVito
Dennis and Dee's ailing grandfather Pop-Pop is wasting away in the hospital, and they have to decide whether or not to pull the plug. But things get complicated when The Gang learns of Pop-Pop's history as a Nazi, and Mac, Charlie and Frank set off in search of the old man's spoils from the war.
