Jessel

Jessel is the main antagonist of The Avengers episode The Superlative Seven. He is portrayed by Donald Sutherland who has also portrayed villains such as Warden Drumgoole, Donald McClintock, Ronald Bartel and President Snow.

At the beginning, Jessel brings in a foreign businessman named Kanwitch to test his fighters on the latter's champion, Toy Sung. After one of the girls on Jessel's team kills Toy Sung in a swordfight, Kanwitch demands a second test. Faking the name "Sir George Robertson DSO CBE KCB", Jessel brings in John Steed and six more, a strongman named Freddy Richards, a matador named Joe Smith, Max Hardy, a fencing instructor wearing German WWI clothing, a gunfighter named Hana Wilde, an unarmed fighting man named Mark Dayton and a gemini man named Jason Wade, who happens to be Jessel's champion on a plane to an island south of England.

On the island, Jessel tests the group on their superhuman progress against Jason Wade who stalks and kills some of the guests one-by-one. To Jessel and Kanwitch's surprise, Emma Peel had somehow snuck her way to the island and the two Jason Wades are killed. With their business a failure, Jessel executes Kanwitch then tries to kill the Avengers in the dining room. Hana Wilde keeps him from reaching for guns on the table, until Steed hits him with a candlestick. Whether he survives or not is unknown.