Rick and Morty director told Christopher Lloyd to be unhinged in filming live-action shorts

Gizmodo

“Everything was pretty scripted out with not much riffing, but when we shot the ‘100 years’ bit I told Chris to just run with it and repeat the lines over and over and try to get a little unhinged,” director Paul B. Cummings said via email with Gizmodo. “We watched that clip from the show a few times right before shooting it.” Cummings also described how, during the shorts’ production, Lloyd opened up to him about “how he felt that Doc Brown and Rick Sanchez were like brothers that took two very different paths in life."