Bad Blood (2003) was a professional wrestling pay-per-view (PPV) event produced by World Wrestling Entertainment (WWE), which took place on June 15, 2003 at the Compaq Center in Houston, Texas. It was the second event produced under the Bad Blood name and starred wrestlers from the Raw brand. This event marked the beginning of pay-per-views (with the exception of the older and more significant Royal Rumble, WrestleMania, SummerSlam and Survivor Series pay-per-views) being brand exclusive. This has now since been discontinued, beginning with Backlash 2007.
The main event was a Hell in a Cell match, featuring wrestlers fighting in a ring surrounded by a steel structure of metal. In this match, World Heavyweight Champion Triple H defeated Kevin Nash to retain his title. Two predominant bouts were featured on the undercard; in respective singles matches, Ric Flair defeated Shawn Michaels and Goldberg defeated Chris Jericho.
The event marked the second time the Hell in a Cell format was used by WWE in a Bad Blood event; the first was at In Your House: Badd Blood in 1997. The 2003 Bad Blood event grossed over $500,000 ticket sales from an attendance of 10,000 and received about 285,000 pay-per-view buys, which was more than the following year's event. This event helped WWE increase its yearly pay-per-view revenue by $6.2 million from the previous year. When the event was released on DVD, it reached a peak position of second on Billboard's DVD Sales Chart.