Captain John Sheridan is a fictional character from the science fiction television series Babylon 5. He serves as the commanding officer of the space station Babylon 5 during its critical years, particularly in the latter half of the series. Sheridan is known for his strong leadership skills, strategic thinking, and commitment to peace among various alien races. Sheridan's character is portrayed by actor Bruce Boxleitner. He plays a pivotal role in the series' overarching narrative, which includes themes of war, diplomacy, and the struggle for freedom. His interactions with other key characters, such as Delenn and G'Kar, highlight his dedication to unity and cooperation in a diverse galaxy.