The Strange Case of Oliver Cromwell's Head

Mark Whitaker explores a bizarre and gruesome story. In 1661, the former Lord Protector Oliver Cromwell's body was exhumed and hanged at Tyburn. His head was cut off and displayed on top of Westminster Hall as a warning to anyone opposed to the monarchy. It stayed there until 1684, when it went missing. It was finally put to rest in Cambridge in 1960, but what happened during the intervening years?