Welcome back, Jon Stewart! The beloved TV host returned on Tuesday, Sept. 3, to The Daily Show stage and his re-entry was a little rocky, to say the least.

Stewart took a three-month hiatus this summer to direct his first feature film, Rosewater, about a journalist's arrest and torture by the Iranian government, and it seems that his experience may have profoundly affected him. The 50-year-old host showed up for his first day of work looking a little worse for the wear -- and speaking in a different language.

"The Middle East has changed him. He's not even acting American. Get him a defibrillator and two Big Macs!" John Oliver, the show's interim host, says to Daily Show correspondent Jessica Williams.

Despite Oliver's efforts to knock some sense into the late-night host, though, he still isn't himself: Stewart instead takes on different personas, from Hitler to Moses to Miley! Yes, just like Miley Cyrus at last week's Video Music Awards, Stewart ends up twerking in a nude-colored leotard with an oversized foam hand.

Eventually, former Daily Show correspondent Stephen Colbert goes in "to break this man."

Watch Jon Stewart's hilarious return to his show and tell Us: Are you happy his back?