The Magician's Apprentice (Doctor Who) episode is a blue-and-silver model as first seen in 1963. Clara, upon deducing the Doctor's location and intent, says "Do not go gentle into that good night", the first line of the titular poem by Dylan Thomas. When the Doctor spies Clara and Missy, he plays the opening notes to Roy Orbison's "Oh, Pretty Woman". The Doctor's playing electric guitar and teaching medieval people the term "dude" echoes the movies "Bill & Ted's Excellent Adventure" and "Bill & Ted's Bogus Journey", films featuring two rocker teens who travel back in time – in a telephone call box – and teach
Dylan Thomas Paul Ferris describes as "unusually blunt"; the ribald "Lament" and an ode, in the form of a villanelle, to his dying father "Do not go gentle into that good night". Despite a range of wealthy patrons, including Margaret Taylor, Princess Marguerite Caetani and Marged Howard-Stepney, Thomas was still in financial difficulty, and he wrote several begging letters to notable literary figures including the likes of T. S. Eliot. Taylor was not keen on Thomas taking another trip to the United States, and thought that if Thomas had a permanent address in London he would be able to gain steady work