On the wall of Lance (Toby Jones)'s flat is a photo of a lady playing tennis in short clothing. An almost identical photo can also be seen in The IT Crowd (2006) in Douglas Reynholm (Matt Berry)'s office.
On winning the quiz Tony, played by lifelong Liverpool fan Adam Riches, can clearly be seen performing his own Daniel Sturridge goal dance celebration.
Gerard Horan (Terry) & Lucy Benjamin (Maggie) also worked together on episode 2.2, Episode #2.2 (2008), of Kingdom (2007) as D.C. Yelland & Patricia Wright respectively.
Terry quotes Lewis Carroll's last dying words when Andy asks him if he needs anything.