Another marathon that has been continuing all year long (okay, so the year’s only into day two) continues and concludes today, with PBS’s Downton Abbey running through its later episodes, all day long until 10:30 p.m. ET tonight. Watch, in particular, for Michelle Dockery as Lady Mary Crawley, who drops her primness and lets loose a bit as the Roaring Twenties arrive – but it’s nothing compared to how Dockery has let loose as the wig-wearing, scene-stealing, everything-stealing kleptomaniac of TNT’s Good Behavior, the latest episode of which is televised tomorrow night at 9 ET. Check local listings.