Update: 13:30 I can confirm that Episode 5.13 was written by Melinda Hsu Taylor and Gregg Nations and will be directed by Jack Bender.
Thanks to my contact we now have 2 more episode titles, one of which has to rank as one of the strangest.
Episode 5.13 - Some Like it Hoth
Episode 5.14 - The Variable
Episode 5.13 is a play on words with the famous film, Some Like It Hot, and for those like me who know their Star Wars, Hoth is the sixth planet of a remote system of the same name.
Hoth Wiki Entry
Speculate away :)