The Doctor, Jamie and Zoe return to Earth and become embroiled in the schemes of Tobias Vaughn. They meet up with an old friend, Colonel (now Brigadier) Lethbridge-Stewart, and some old enemies, the Cybermen.
Romana fancies a proper holiday and convinces the Doctor to visit the leisure planet Argolis, where a takeover by the Argolins' historic enemy is underway.
Recorded at Ronnie Scott's in London in 1974 and backed by the Tommy Flanagan Quartet, Ella Fitzgerald performs some of her most famous songs, including George Gershwin's The Man I Love.