Just thought you might want to get a look at some of the pretty images Starz released for tonight’s all new premieres of PARTY DOWN and GRAVITY, starting at 10PM! On PARTY DOWN, the team heads to Jackal Onassis’ (Jimmi Simpson) backstage party, now with Henry in charge and Ron MIA.  Constance left at the end of last season (to film GLEE…), and Megan Mullally has joined the cast as Lydia and she is a great addition!  Ryan Hansen and