In this episode, Homer meets a British secret agent looking for a Russian spy, and they suspect it may be Grampa.
In 1970, Head of the British Intelligence Agency, Terrance, is sent to America after a Russian spy named "the Grey Fox".
50 years pass, and Terrance has finally found a clue of where the Grey Fox is, which is in Springfield retirement home.
Executive producer Al Jean stated that, in early drafts, the Grey Fox was going to be Jasper.
[1] Stephen Fry was cast for four roles including Terrence, his daughter Hazel, and the head of MI-5.
The conference room at the beginning of the episode refers to the one in Tinker Tailor Soldier Spy.
[10] Tony Sokol of Den of Geek gave the episode 3.5 stars out of 5, stating "'The Man from G.R.A.M.P.A.'
The British spy film references come too respectfully, and the laughs have to squeeze through too stiff an upper lip.