Semi-Final 1 of Robot Wars: The Second Wars was the first of two Semi-Finals to determine which two of six heat winners would proceed to the Grand Final of Robot Wars: The Second Wars. As usual, a Gauntlet would eliminate one robot, while the Trial (Pinball) would eliminate another. The remaining robots would pair off and fight to determine which two robots moved on to the Grand Final. The episode featuring Semi-Final 1 was originally broadcast on February 19, 1999 on BBC Two.