The Thunderbolts are a team of antiheroes in the Marvel Comics universe. The team was initially introduced as a group of supervillains posing as heroes to gain the public’s trust after the aftermath of the Onslaught event. The original members included Baron Zemo, Beetle, Fixer, Goliath, Mach-1, Meteorite, and Songbird.
Over time, the Thunderbolts evolved into a team of reformed supervillains who worked to make amends for their past actions. The team has had several iterations over the years, with various members coming and going.