The Welsh line, "Croeso i Cymru" spoken at one point by PC Andy, means "Welcome to Wales" in English.
At one point Bridget tries to convince Lois that John Frobisher ( Peter Capaldi ) is actually, "a good man". A running theme of the 12th Doctor (also played by Capaldi) on Doctor Who (2005) is him asking if he is, "a good man".
In this episode John Barrowman, as Jack Harkness (a former companion of The Doctor), comes face to face with Frobisher, played by Peter Capaldi. Capaldi would later go on to play the Twelfth Doctor.
This episode takes place in September 2009 and February 2010.