Doctor Who - Season 4 - Eps 6: The Doctor's Daughter
The Doctor lands on the remote planet Messaline as an age-old war rages and the threat of genocide looms. When Martha is kidnapped by the Hath, the Doctor is distracted by "the most important woman in his life."
About Doctor Who

Title: Doctor Who
First Air Date: 2005-03-26
Last Air Date: 2021-12-05
Status: Ended
Rating: 7.542/10 (from 3098 votes)
Language: EN
Seasons: 14
Total Episodes: 153
Network: BBC One
Genres: Action & Adventure, Drama, Sci-Fi & Fantasy
Production Companies: BBC Cymru Wales, BBC Studios, CBC
Synopsis
The Doctor is a Time Lord: a 900 year old alien with 2 hearts, part of a gifted civilization who mastered time travel. The Doctor saves planets for a living—more of a hobby actually, and the Doctor's very, very good at it.
Cast

Jodie Whittaker
The Doctor

Mandip Gill
Yasmin 'Yaz' Khan

John Bishop
Dan Lewis