This episode features the first and (so far) only appearance of Zombies.
Music:
- I Need You Tonight, by Professor Green featuring Ed Drewett, from the album Alive Till I'm Dead (2010)
- Oh Pretty Woman, by Roy Orbison (1964 single)
- Dusk Till Dawn, by Ladyhawke, from the album Ladyhawke (2008)
- Ready for the Floor, by Hot Chip, from the album Made in the Dark (2008)
- No Surprises, by Radiohead, from the album OK Computer (1997)
- It's Bad You Know, by R.L. Burnside, from the album Come On In (1998)
Sasha (Alexandra Roach) and Gethin (Jonny Owen) may be based on real life Welsh couple rugby international Gavin Henson and singer Charlotte Church.
Although not seen together in a scene, George (Russell Tovey) and Graham (Tonly Maudsley) have worked together in The Job Lot (2013-2015).