Creating some nice storytelling possibilities for season 13, Doctor Who's holiday special, "Revolution of the Daleks," introduced a new branch in the Dalek family tree and a new creator of the Daleks: Jack Robertson, played by Chris Noth. Robertson is a naked Trump satire, and to associate a treacherous human character like Robertson with a new generation of Daleks is darkly funny. Also based on the special, Robertson is clearly unafraid to confront the Daleks for personal gain. It seems likely, then, that Jack Robertson will return to Doctor Who next season.
The Daleks were introduced into Doctor Who in the very beginning. The gnarled green visage of the Daleks' original creator, Davros, rolled onto TV screens in the 12th season of the classic series, facing off with the fourth Doctor, played by Tom Baker. It's revealed in "Revolution of the Daleks" that the damaged casing of the Reconnaissance Scout Dalek from the 2019 New Year's special, "Resolution," was intercepted by none other than Jack Robertson, an American first seen battling giant toxic spiders in season 11 of Doctor Who. Robertson steals the metal carcass to develop what he calls defense drones, and, when faced with which side with which to align himself, clearly chooses the Daleks. Eventually, though, Robertson backtracks, claiming to have acted as a decoy.
At the end of the special, Robertson is interviewed on TV, playing-up the Dalek misadventure to his benefit, positioning himself as a populist hero, and possibly reviving the political ambitions first mentioned back in season 11. An Earth-based leader like Robertson becoming President of the United States while wielding a private army of Daleks sets up the potential for a showdown with Davros in season 13. The political implication of Robertson leading a Dalek faction also fits nicely alongside Chibnall's tendency toward topical storytelling.
Even though all Daleks appear to be destroyed at the end of the holiday special, Davros could have been alerted to the existence of Robertson's Daleks when the Doctor summoned the death squad Daleks with the Dalek reconnaissance signal. It's also plausible that once Robertson had a taste of Dalek power, he might have immediately set about recreating his "defense drone" Reconnaissance Daleks to control the planet. Davros would then mobilize the Dalek fleet, traveling through time to Earth in order to once again reclaim supremacy.
If the Doctor were indeed to be responsible for summoning Davros by way of the reconnaissance signal, however inadvertently, she'd naturally feel it was her responsibility to protect the planet, grappling with yet another decision to trade short-term benefit for long-term risk, as she did at the end of season 12 when confronted by the Lone Cyberman. This could send Jodie Whittaker's Doctor in an even darker direction, and with rumors of season 13 being her last, a battle between Robertson and Davros, with the Doctor in the middle, creates a breathtaking backdrop for her regeneration. It's even possible that Davros is defeated once and for all, leaving Robertson the universe's last remaining ruler of the Daleks and positioning Earth as a new Dalek homeworld.
Regardless of what comes to pass in season 13, a new chapter of the Dalek saga written by a human Dalek overlord is one of the freshest ideas Doctor Who has offered in quite some time, particularly when so many narrative beats in Chibnall-era Doctor Who - especially the surprise reveal of a new Doctor and the return of Jack Harkness - feel so naggingly familiar. A new twist on the Dalek creation myth also adds some much-needed menace to the Dalek threat that, after more than 50 years, is naturally somewhat blunted. The only way to find out for sure what comes next for Jack Robertson, though, is to buckle up and wait for season 13.