Hell in a Cell is a professional wrestling cage-based match held in WWE (formerly World Wrestling Federation). It features a large roofed steel cage structure or "cell" which encloses the ring and ringside area. While similar to the steel cage match in profile and structure, unlike the steel cage match wherein exiting over the cage results in a win, only executing a pinfall or submission will result in a win. As in a steel cage match, disqualifications do not apply. The original Cell was 16 ft (4.9 m) high and weighed over two tons but has since been replaced by an amplified version of 20 ft (6.1 m) and five tons. Thirty-six Hell in a Cell matches have taken place in WWE since its inception in October 1997.
The original concept for the Hell in a Cell structure was created by Jim Cornette. As detailed in the Kayfabe Commentaries release "Timeline of WWE: 1997", Cornette described this concept as a combination of a cage which surrounded the majority of the ringside area (this was a cage design which was popular in Memphis wrestling promotions), and the cage used in both the NWA (National Wrestling Aliance) and WCW (World Championship Wrestling) for their WarGames matches (which had a top on the cage). On an October 2015 video podcast, Vince Russo said Cornette probably did come up with the concept, but the name "Hell in a Cell" came from him.
The Hell in a Cell match was first introduced at WWF Badd Blood on October 5, 1997 at the Kiel Center, now known as Scottrade Center, in St. Louis, Missouri. The background to the inaugural match was built on Undertaker's loss to Bret Hart two months prior at the 1997 SummerSlam in a WWF World Heavyweight Championship match which Shawn Michaels was assigned to referee. Michaels had deliberately interjected himself in the match and cost The Undertaker a win which resulted in a match between the two at In Your House: Ground Zero. That match was ruled a no-contest due to the two bypassing and attacking the officials. As a climatic end to the feud, their following bout was originally scheduled to be held as a steel cage match. However, instead of a normal cage enclosing only the ring, a larger roofed structure was constructed, enclosing not only the ring but also the surrounding ringside area. The wider space between the ring apron and the cell walls allowed for entering and exiting the ring. At Badd Blood, Michaels defeated The Undertaker, (with interference from The Undertaker's debuting brother Kane) and won the number-one contendership to the WWF World Heavyweight Championship. The cage's size also makes the use of weapons possible as well. Wrestlers usually use weapons in Hell in a Cell by taking them from under the ring.