Four episodes from the TV series. The positive-negative man: When an assailant with a decidely electric personality begins murdering scientists involved with the mysterious "Project 90, " tt takes the well-grounded Avengers to short-circuit his plans. Murdersville: When a village-wide conspiracy conceals a carnage cottage industry, The Avengers find themselves pitted against an entire town. Mission highly improbable: When a batty boffin develops a miniaturization ray, The Avengers refuse to shrink from their duty to cut him down to size. The forgert-me-knot: A truly unforettable episode, "The forget-me-knot" was Diana Rigg's final adventure with The Avengers. Despite amnesia-inducing darts that rob them of their memories, Steed and Emma leave an indelible impression on a traitor to the Crown. "The forget-me-knot" also introduces Mother, Steed's superior, and Tara King, Emma's successor.