How the IRA got their hands on the world’s most valuable horse. Plus, dancers and jugglers ahoy in the grand final of Britain’s Got Talent. Here’s what to watch this evening How the IRA got their hands on the world’s most valuable horse. Plus, dancers and jugglers ahoy in the grand final of Britain’s Got Talent. Here’s what to watch this evening 8pm, Channel 4 “Somebody comes up with the idea that they’re going to kidnap a racehorse.” In 1983, Shergar was the most valuable horse in the world,