Sigourney Weaver was persuaded to take this role by her best friend of forty-two years, Selina Cadell. (Miss Tishell). The two girls met at drama school in London during 1972. Sigourney's husband accompanied his wife; whilst filming he thoroughly enjoyed surfing in the Cornish sea.
Sigourney Weaver returns as Beth Traywick. She previously appeared in episode 7.7, Facta Non Verba (2015) and was credited as "American Tourist".