The Well was the third episode of  (also marketed, globally, as Season 2) of . It premiered on  . It was the first episode of Series 15 to feature a new writer, , who co-wrote the script together with . The story features the second appearance and return of the , first seen 17 years prior in the , thus serving as a sequel to  [+] from .   Continuing directly after their encounter with  in the , The Well continues one of Series 15's main story arcs of the Doctor being unable to get the TARDIS to return Belinda to the 24th May 2025, and with the two discovering that, by the 5020th century, something has caused Earth to cease existing entirely.  also briefly appears at the end of the story: this time, she is seen in a videocall as a superior official to the mining crew. Her appearance here continues the enigmatic nature of the character that has been hinted and shown since her first appearance in  [+], and continues the story arc of Mrs Flood somehow appearing in different eras of time that was first seen in the previous story, Lux. Contents Synopsis Far in the future, on a tough, brutal planet, a devastated mining colony has only one survivor. To discover the truth, the Doctor and Belinda must face absolute terror... Plot To be added...  showed Mo a picture of a vindicator to find out if the Doctor was travelling with one. After Mo confirmed he was, Mrs. Flood described this as "exactly what I needed to know. Just as I predicted. A vindicator, in action, that's very good news." Cast  -   -  Aliss Fenly -  Shaya Costallion -  Cassio Palin-Paleen -  Mo Gilliben -  Hanno Yeft -  Callo Rence -  Kai Sabba -  Albie Bethick -  Sal Van Hyten -  Ulric Dazen -   -  Val Vivo -  Trooper 5 -  Trooper 6 -  Trooper 7 -  Trooper 9 -  Trooper 10 -   -  Crew