Tenth Doctor made a significant appearance in the final story of the Donna Noble: Kidnapped! spin-off series starring Catherine Tate as Donna Noble. In 2020, Tennant appeared alongside Tom Baker as the Fourth Doctor in the first story of the Out of Time trilogy and co-starred in three audio plays opposite Alex Kingston as River Song in The Tenth Doctor and River Song. Tennant also made an uncredited cameo in series eight of The Diary of River Song as the Doctor. In 2021, as well as starring in the nine-part Dalek Universe saga (which sees the Tenth Doctor trapped in the pre-Time War universe and separated from the TARDIS), Tennant reprised the Tenth Doctor for the second part of the Out of Time trilogy, fighting Cybermen with the Fifth Doctor (Peter Davison) in The Gates of Hell. As part of the multi-platform Time Lord Victorious storyline, Tennant co-starred in Echoes of Extinction alongside Paul McGann as the Eighth Doctor. He was set to be the first Doctor to appear in the spin-off series Torchwood, reuniting Tennant with John Barrowman as Captain Jack Harkness and Gareth David-Lloyd as Ianto Jones, for Absent Friends. However, while this story was recorded, its release was cancelled in May 2021. The Out of Time trilogy concluded in June 2022 with Wink, featuring the Tenth Doctor and the Sixth Doctor battling Weeping Angels. In the same month, Tennant appeared as the Doctor in the seventh series of The War Master opposite Derek Jacobi as The Master. In September 2022, Big Finish released the Tenth Doctor, Classic Companions special, which reunites the Doctor with K9, Ace, Leela and Nyssa; he retrieves K9 from a temporal anomaly, helps an alternate version of Leela save a village, rescues Nyssa from a criminal using Time Lord technology as part of a scam, and subsequently leaves K9 with Ace after they stop Axos ("The Claws of Axos") from escaping its time loop prison. The Tenth Doctor has made other Big Finish appearances that did not involve Tennant, using other actors to voice the Doctor. In April 2018, The Tenth Doctor Chronicles featured four new stories and starred voice actor Jacob Dudman as the Doctor and narrator; Jacqueline King and Michelle Ryan reprised their roles as Sylvia Noble and Lady Christina de Souza respectively. The Churchill Years featured stories of the show's portrayal of Winston Churchill - played by Ian McNeice narrating