Fox came out of retirement to star in the series, which features Ford as a therapist who has Parkinson's disease

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.”

M ichael J. Fox will return to the small screen with his role in Shrinking, the acclaimed Apple TV+ series starring Harrison Ford and Jason Segel. Ford has opened up on working with Fox on the show, reflecting on the experience.