The Avengers 5.10: Never, Never Say Die. An episode that sets out its store of intrigue quite nicely, and hums confidently along, but ultimately reveals itself holding the least plausible of decks. Never, Never Say Die sounds like a Bond title and tends to be a fairly highly-regarded episode, however; I can only assume much of that is based on its illustrious guest star, Christopher Lee, strutting his stuff in dual roles; both Professor Frank N Stone (hur-hur) and his monster, a part he has, of course, played before.