Bob (Bill Nighy) holds his gun with just a thumb and middle finger, with his index on the trigger. This unusual grip is because he suffers from Dupuytren's contracture, which means he can't straighten the ring and little fingers on each hand.
Kaley Cuoco's character Emma Brackett mentioned about being in Nebraska for work. Cuoco's Big Bang Theory (2007) character Penny was from Nebraska.
Dave (David Oyelowo) mentions to Emma (Kaley Couco) that his next exhibition contains photos of Beirut and Turks & Caicos. Bob ( Billy Nighy) is the lead of a film titled Turks & Caicos (2014) the second film of the Worricker Trilogy.
Emma's handler's name is Raj. Raj was a character on The Big Bang Theory, in which Cuoco starred.