Bernice Summerfield: The Heart's Desire (6.1)

Christmas is a time for family, for feeling a bit sick after you've stuffed your face full of food and for forcing a smile at the musical socks that Braxiatel thought would amuse you. It's not a time for zipping halfway across the galaxy with the wafer-thin hope that you can save your home from being destroyed by a previously uncharted pulsar that's heading your way.

And that's pulsing a message in Morse Code.

Deciphering the message leads Bernice Summerfield to Marlowe's World, a place where death is irrelevant even though it lies at every corner, where the wildlife is just sooo cute - but lethal - and, most important of all, where you must be very, very careful what you wish for...