Jon Stewart‘s back this week, and just in time to watch Lawrence O’Donnell interview an empty chair. On his show Tuesday, Stewart opened by poking fun at the O’Donnell interview — before deciding to do his own interview…with a fan.

O’Donnell was supposed to interview George Zimmerman‘s lawyer on his show Monday night, but the lawyer left the studio last minute. Furious, O’Donnell proceeded to interview an empty chair with questions he had for the lawyer.

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