The series opener garnered a 40.1% audience share for the BBC in the U.K. After the episode came to a close, an extended preview of upcoming installments revealed glimpses of new guest stars who will appear throughout the ten-episode run.
Blogtor Who, another site dedicated to the show, said Whittaker was "utterly believable" in the starring role.
It's a change from the usual tailored fashion of Barbie costumes: Whittaker's Doctor picks out her jumble of mismatched clothing at a charity shop.
Also on the cast, The Doctor will have three companions with her - Bradley Walsh, Tosin Cole, and Mandip Gill, who will play Graham O'Brien, Ryan Sinclair and Yasmin Khan.
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"Once she steps out in her new costume and with her beaming smile, there is no question that Whittaker is ideal for the role".
"Introducing the all-new #DoctorWho Barbie doll inspired by the iconic series' Thirteenth Doctor", the official Barbie Twitter account announced Sunday. It's rare that I don't love Doctor Who, even when I'm frustrated with it, even when it makes me cry, but this was one of those times. Still, the feeling of inevitability towards her death that crept in at the very start of the episode, coupled with the semi-unearned, telegraphed sense of it when it happened sat wrong with me.
This allowed us to explain the science of time travel (yes, it is possible), regeneration (you do this roughly every seven years, with exceptions) and extra dimensions (yes, they are possible!) to an audience of more than 6,000 people who would never knowingly attend a science lecture. "But, I certainly wasn't coming at it from a Whovian standpoint, so it's been exciting for me to kind of be welcomed in and realising why there's so much love for it out there, because it's absolutely incredible, and I think it's been a really exciting journey and one that I'm really glad is not over yet".
While there wasn't a surprise phone call or shock cameo in this instalment, we did manage to see the Doctor get to work building her Tardis - or Tardis-esque contraption - completely from scratch, along with her sonic screwdriver.
If you're a fan of the show already, it's got everything you'd expect.
'That was probably the best New Doctor episode of NuWho.
But Whittaker assured people previous year when her debut was announced that no one should be frightened now that Dr. She nails the character and immediately re-energises a series that was in danger of disappearing into its own black hole. It will screen on the ABC on Monday nights at 5.55pm.