The Haunting of Hill House star Henry Thomas has joined the DC Universe live action series Stargirl in the recurring guest-star role of Golden Age Dr Mid-Nite. According to Entertainment Weekly, Dr Mid-Nite is a brilliant and forward-thinking medical pioneer, and a founding member of the JSA. With his trusty owl, he acts as the team’s resident doctor and detective. Thomas is the latest addition to the cast of the show. Last week, it was announced that Joel McHale will play Golden Age Starman/Sylvester Pemberton and Lou Ferrigno Jr Was cast as Golden Age Hourman.