A man named Miller dies in a car accident, the autopsy discovers £50,000 worth of diamonds in his stomach, Steed's enquiries lead him to wealthy businessman and philanthropist Mr Litoff.
It's a difficult one, because the later remake, The £50,000 breakfast, is probably one of my favourite episodes, and whilst it's a little more outrageous, it's a hugely entertaining episode, but i did enjoy this one, it deserves credit for being the original, and it's a really clever and engaging storyline.
Steed is great here, he and Cathy share some fine moments, best of all, Steed and The Good Doctor wine tasting.
Leslie French perhaps steals the show as Gregory, the excellent and clever butler, but John Laurie and Frederick Jaeger are both excellent, I'm such a fan of the latter, will never forget his role on Dr Who's Planet of Evil, that voice is so distinctive.
8/10.