The writer, who's return to Doctor Who was announced last year has been hard at work putting together the show's 60th anniversary specials and the upcoming 14th season which will air in 2024.
Speaking Michael Ball on BBC Radio 2, Davies said he was very pleased with how things had gone so far: "I sat here and I watched episode four last night, and I think it's one of the greatest things I've ever made in my life so I'm very, very happy with it."
He added: "It's looking so good Michael, I love it."
The Bafta winner will oversee this year's anniversary specials which see David Tennant return to play the Doctor. Catherine Tate is also reprising her role as Donna Noble while Neil Patrick Harris joins the cast in a villainous role.
At the conclusion of the specials, Ncuti Gatwa will become the fifteenth Doctor after he was briefly seen at the end of Jodie Whittaker's last episode.
He will be joined by former Coronation Street star Millie Gibson as his companion Ruby Tuesday.
While not much is known about season 14, it will be eight episodes and that Jemma Redgrave would return as Kate Stewart.
Other casting announcements include Aneurin Barnard as Roger ap Gwilliam while Anita Dobson and Michelle Greenidge have been cast in undisclosed roles.
Davies originally ran Doctor Who between 2005 and 2010. Since then he has created a number of acclaimed shows including It's A Sin for Channel 4, A Very English Scandal for BBC and Nolly for ITV.
Doctor Who will return this November on the BBC in the UK and Disney+ internationally.
Watch below: Doctor Who 60th anniversary specials trailer