Jon Hamm and John Slattery suited up for an afternoon of filming Mad Men in LA today. The costars headed out of their on-set hotel and hopped into a vintage Mustang for the scene. Jon and John are back to work on the AMC series after taking a break from the cameras during award season. Jon attended the Golden Globes and the SAG Awards, where John also made an appearance, and wrapped up the fun at Vanity Fair's Oscars party last month. They'll be back in the spotlight soon since the sixth season of Mad Men returns April 7 with a two-hour-long premiere. As usual, creator Matthew Weiner has been tight-lipped about what's in store for the characters, but we did get a glimpse at Don Draper, Joan Harris, and Roger Sterling in the short Mad Men teaser that was released yesterday.