We get a Monty Python reference, a nod to previous Who companion Teagan (Janet Fielding), a classic Bond Girl, Diana Rigg, playing the villain of the piece Winifred Gillyflower, the return of Silurian Madame Vastra (Neve McIntosh), Sontaran butler Strax (Dan Starkey) and the enchanting Jenny (Catrin Stewart). All bundled up in a script…