As 24: Live Another Day approaches the end of its season, new shocking revelations have been made, including the return of Jack Bauer's number 1 enemy, Cheng Zhi.

Monday's episode surprised viewers as Jack's biggest enemy made his come-back. Cheng Zhi was revealed as the one responsible for the development of the override device that is about to cause a world war among nations.

Cheng is best known as the man responsible for torturing and kidnapping Jack for a year, and once spreading his wrath as he shot Adrian in the head while using Chloe to activate the device.

Major shock and horror will be expected to consume the remaining episodes of 24: Live Another Day. Jack's number 1 enemy sends a message to the US nuclear submarine to aim fire on one of China's carriers. Such an act is expected to cause worldwide chaos and is believed to be the start of World War III.

The newest spoiler clip for next week's episode of 24: Live Another Day Episode 11 promo released last night, and reveals that Audrey will try to make use of diplomatic channels to prevent another war in the world's history.

Jack Bauer will also lead Kate Morgan and Mark Boudreau to locate their targets and certain traitors will be exposed. Now that Cheng is back as the number 1 villain, viewers can expect to see how Jack will save the day this time. Episode 11 of 24: Live Another Day will air on Monday, July 7.