Rose Ayling-Ellis, who plays Aliss, is deaf in real life.
This is the second time the song "Toxic" by Britney Spears is played in Doctor Who. The first was with the 9th doctor in The End of the World (2005).
The Doctor first visited planet Midnight (now called 6-7-6-7) in season four's episode Midnight (2008).
Rose Ayling-Ellis (Aliss) and Anita Dobson (Mrs Flood) both previously had roles in Eastenders (1985) as Frankie Lewis and Angie Watts during different time periods.
Marks Bethany Antonia's third time playing a Doctor Who character. She previously played Captain Rocky in the Doctor Who: The Seventh Doctor Adventures (2001) episode Naomi's Ark (2023) and Elta the Acolyte in the Call Me Master (2025) episode The Good Life (2025).