His presence on set has been “essential,” the “Indiana Jones” actor told Variety in an interview published Wednesday, saying that Fox “gives me both a physical representation of the disease to inform myself with, but more than that, he allows me to believe that Paul could believe that he could be adequate to the challenge.”

Shrinking is the second show in which Harrison Ford is part of the main cast, and he has recently been nominated for his first Emmy Award for Outstanding Supporting Actor in a Comedy Series.