Ep 4. The See-Through Man

The Avengers Season 5 Episode 4 is titled "The See-Through Man," and it focuses on the mysterious disappearance of several scientists. The episode begins with a scientist named Professor Swain, who has been conducting research on a powerful new laser. Swain contacts Steed and Emma Peel at their headquarters to report that he has been receiving threatening messages. Before they can investigate further, Swain suddenly disappears and is replaced by an impostor who claims to have taken over Swain's work.

Steed and Emma quickly become suspicious of the impostor and begin to investigate. They discover that several other scientists have disappeared in a similar manner, and they begin to suspect that there is a connection between these disappearances and the laser research. Their investigation leads them to a suspicious manufacturing plant, where they meet a man who claims to have developed a technology that allows him to become invisible.

The man, named Markel, explains that he has been using his technology to spy on the scientists and steal their research. He agrees to help Steed and Emma find the missing scientists in exchange for their help in escaping the country. However, when they arrive at Markel's laboratory, they discover that he has been working with a group of foreign agents who plan to use the laser to launch a devastating attack on the British government.

Steed and Emma must now race against time to stop the agents and save the missing scientists. In a thrilling finale, they confront the leader of the agents, a ruthless man named Zalenko, in a high-stakes showdown.

The See-Through Man is a classic episode of The Avengers, featuring all the elements that made the show so popular. With its inventive plot, clever dialogue, and thrilling action sequences, this episode is sure to delight fans of the series and new viewers alike.