In 2001, television audiences were introducedtoKiefer Sutherlandas Jack Bauerin the espionage drama24.

This action drama featured a Counterterrorism Unit, known as CTU, headed by Jack Bauer.

Their mission was to prevent terror attacks from taking place in the United States.

Kiefer Sutherland as Jack Bauer in a promotion image for the eigth season of 24.

Image via 20th Century Fox Television

This had never been done before, and the show’s creativity led to universal acclaim.

The show won several awards during its run, including a Golden Globe in 2004 for Best Drama Series.

He works with CTU to take down terrorists who are threatening the United States with nuclear weapons.

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Over the course of the day, Bauer discovers that members of his own family may be involved.

Woodsideas Wayne Palmer, the newest President of the United States and brother to former President, David Palmer.

The fourth season premiered in 2005 and was released to universal acclaim.

Corey Hawkins as Eric Carter, pointing a gun, in 24: Legacy

Image via 20th Century Fox Television

The season introduced new characters and wrapped up storylines that had begun in seasons prior.

This season also differed from previous years, featuring a more contained story with one central antagonist.

Senator David Palmer, Jack Bauer and CTU attempted to save the senator’s life.

Keifer Sutherland interrogating a man in 24

Image via Fox

Released in 2001, the first season of24was a massive hit due to its unique presentation and captivating story.

Critics praised the season for its high concept and the performances from the cast, most notably Kiefer Sutherland.

The season featured many twists and turns and kept audiences on the edge of their seat.

Mary Lynn Rajskub holding a gun looking nervous in 24

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After being framed for assassinating several former friends, Jack Bauer emerges to help stop the terrorist threat.

The season finale was the only one in the series to feature no deaths across the 10 days.

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Chase Edmunds in 24 Season 3.

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Keifer Sutherland and Mary Lynn Rajskub escaping an explosion in 24: Live Another Day

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A doctor and Keifer Sutherland in a dim lit doctors office in 24

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Elisha Cuthbert frightened and holding a knife in 24

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Kiefer Sutherland as Jack Bauer in Season 4 of 24

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Jack Bauer, played by Kiefer Sutherland, pointing a gun in the first season of 24.

Image via 20th Century Fox Television

Leslie Hope pointing a gun with blood on her hand in 24

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