UPDATE: According to a December 6 Deadline exclusive, “Doctor Who showrunner Chris Chibnall has promised fans that season 12 is going to open with the biggest and most ambitious episode ever of the BBC sci-fi drama.”
Spyfall, which will premiere on BBC One and BBC America on January 1, 2020, will be “‘movie-like’ two-part curtain-raiser”.
“’Episode one is probably the biggest episode of Doctor Who we’ve done, or has been done, I would imagine. Physically, there’s a lot of stunts, there’s a lot of locations, it’s a globe-trotting action thriller,’ he said. ‘But you don’t want to lose sight of character and intimacy and emotion. You can’t do everything at 11.’”