Goodnight, Vienna
From Tardis Wiki, the free Doctor Who reference
Goodnight, Vienna was a reference the Twelfth Doctor used in his anti-war rant to Bill Potts. (TV: The Lie of the Land)
Behind the scenes[[edit] | [edit source]]
While not elaborated in the episode, this is a reference to a film about lovers separated in World War I. As obvious from the title, the film is set in Vienna.