The BEST episodes written by Patrick Campbell

#1 - The Yellow Needle

The Avengers - Season 1 - Episode 16

After an unsuccessful murder attempt against Sir Wilberforce Lungi, Steed asks Keel, an old friend of the pro-Western African leader, to investigate Lungi's secretary, Jacquetta Brown. Meanwhile, Steed flies to Africa to meet Lungi's tribalist rival, Shebro.