In this very last episode of "Endeavour", there is finally the "easter egg" reference long-term devotees have been waiting for - Morse mentions that the dead man Andrew Lewis has a relative who is a police cadet and whose name is Robert Lewis: the very man who would become Sergeant Lewis, the future Morse's faithful sidekick as played by Kevin Whately.
This was the last-ever episode of this long-running series, so it is appropriate that the episode title was "Exeunt", Latin for "they leave".
Actor Shaun Evans finished his run as Endeavour Morse at the age of 43. Actor John Thaw began his turn at Inspector Morse at the age of 44.
Easter Egg: The Lonsdale College courtyard where DCI Fred Thursday becomes dizzy, is the same location where Inspector Morse suffers his heart attack in the finale of Inspector Morse: The Remorseful Day. The camera shot is a direct visual quotation.
Bright's successor at Castle Gate is a certain "Superintendent Prettyman" - related, perhaps to the "R.G. Prettyman" character in the famous "Inspector Morse" episode "Masonic Mysteries".