Christmas 2015: "The Husbands of River Song" - Poster and Synopsis Revealed

The BBC have revealed the title - "The Husbands of River Song" - for the 2015 Christmas Special, together with the "Official Poster" (full size version of the above poster is in the Who-Natic Gallery) and a new official synopsis:

It’s Christmas Day on a remote human colony and the Doctor is hiding from Christmas Carols and Comedy Antlers. But when a crashed spaceship calls upon the Doctor for help, he finds himself recruited into River Song’s squad and hurled into a fast and frantic chase across the galaxy. King Hydroflax (Greg Davies) is furious, and his giant Robot bodyguard is out-of-control and coming for them all! Will Nardole (Matt Lucas) survive? And when will River Song work out who the Doctor is?

All will be revealed on a starliner full of galactic super-villains and a destination the Doctor has been avoiding for a very long time.

It's not just me, is it?  But in the official poster above, whilst the Twelfth Doctor seems to be brandishing a new Sonic Screwdriver...River Song appears to have armed herself with a pizza cutter...