Final answer:
The TV show featuring the mysterious group fsociety is Mr. Robot, which delves into themes of cybersecurity, hacker culture, and societal critiques.
Step-by-step explanation:
The TV show that introduced the world to a mysterious group known as fsociety is A) Mr. Robot. This series focuses on the life of Elliot Alderson, a cybersecurity engineer and hacker who becomes involved in a complex game of global dominance when he and his enigmatic colleagues at the underground hacker group fsociety engage in activities to disrupt the corrupt practices of large corporations.
Throughout its run, Mr. Robot received critical acclaim for its portrayal of hacker culture and its critique on society and the influence of technology on people's lives. The show combined elements of psychological drama and suspense, featuring complex characters and a thought-provoking narrative.