Pretty awesome: HBO has partnered with New York's MTA to put an actual 1920s subway train back in service on the 2/3 line during weekends in September to promote Boardwalk Empire, the Prohibition-era drama whose second season premieres Sept. 25. The train was originally used for the IRT system, and began service in 1917, reports the Village Voice.  It will be making short runs on the express track between 42nd and 96th Street between noon and 6 p.m. on Saturdays and Sundays this month. The cars will feature authentic details such as rattan seats, ceiling fans, and drop sash windows—as well as some inauthentic details like a shitload of Boardwalk Empire ads. UPDATE: See video and more photos of the train here.