Actor John Travolta has been spotted all over the city for “The Forger.” He’s filmed scenes of the movie with Abigail Spencer on Commonwealth Avenue, chatted up fans at the Liberty Hotel, and on Wednesday, he was at the South Bay House of Correction with House of Correction Superintendent Yolanda Smith , state Senator Anthony Petruccelli (who was there for a tour), and Suffolk County Sheriff Steven W. Tompkins . Travolta was there to film with “Forger” costar Christopher Plummer .Mark Shanahan can be reached at firstname.lastname@example.org. Follow him on Twitter @MarkAShanahan. Meredith Goldstein can be reached at email@example.com. Follow her on Twitter @MeredithGoldste.