Ep 21. A Touch of Brimstone

The Avengers season 4 episode 21, titled "A Touch of Brimstone," follows John Steed and Emma Peel as they infiltrate a secret society known as The Hellfire Club. The club is led by the infamous Mrs. Emma Peel, who is publically known for her flamboyant behavior and scandalous antics. However, it is not until Steed and Peel investigate deeper that they uncover the club's true intentions.

As they navigate through the club's elaborate and dangerous rituals, Steed and Peel discover that the club is plotting a diabolical scheme that could have disastrous consequences for the world. With time running out, Steed and Peel must use all of their skills and resources to stop the club's sinister plans and save the day.

The episode features a range of interesting and eccentric characters, including members of the Hellfire Club and their associates. It also showcases the iconic partnership between Steed and Peel, who work seamlessly together to take on threats that seem insurmountable.

Overall, "A Touch of Brimstone" is a thrilling episode that challenges viewers to question their assumptions and anticipate unexpected twists and turns. With fast-paced action and a touch of humor, it is sure to keep audiences on the edge of their seats from start to finish.