A look at some of the fiercest rivalries in the history of the WWE, WCW, NWA and ECW wrestling franchises. While a sense of competition and even a little animosity is inevitable in a sport based around combat, quirks of personality or past aggravations can ensure that certain rivalries have more spice than others. Among the memorable enmities explored in the programme are John Cena and Edge, 'Stone Cold' Steve Austin and Vince McMahon, and Ric Flair and Ricky Steamboat.