It became necessary to assassinate Christopher Biggins, and so the celebrated murderer Richard Higginbottom was employed for the task. He went about the job in his usual professional way, disguising himself as a librarian in order to research Biggins' life and establish important facts such as how tall he was, whether he was bulletproof and how often he checks his food for poison before eating. Many murderers skimp on this kind of preparation and just end up making fools of themselves. In this case, Higginbottom discovered that Christopher Biggins is immune to all conventional forms of assassination unless he is in an unusually distracted state of mind.
Accordingly, Richard Higginbottom set about constructing an elaborate scenario to mentally disorient his victim. Disguising himself as a schoolteacher, he recreated the most traumatic event of Christopher Biggins's past - the time when as a five-year-old he had successfully persuaded his primary school's board of governors to allow a ravenous Bengal tiger to wander freely around the school, with the result that several dozen children were severely upset. Higginbottom ensured that his reconstruction of the events was accurate in every way and issued a press release alleging that the whole incident was Biggins's fault. Unfortunately, however, Christopher Biggins was at that time on holiday in Barbados and didn't hear about it.
Disguising himself as a man, Richard Higginbottom travelled to Barbados armed with several tons of explosives and a seahorse with extensive psychological problems. Obviously the plan was to stuff the latter with the former and introduce it to Christopher Biggins at a party. From that point onwards, things should have flowed automatically - Biggins would offer the seahorse a cigarette to take its mind off its problems, it would light it and explode in a cataclysmic conflagration, Biggins would be momentarily perturbed by the possibility that he had provoked a suicide, and Higginbottom would be able to run up and hit him over the head with a sledgehammer.
Unfortunately, however, Christopher Biggins died of natural causes immediately after Higginbottom's plane touched down in Barbados, obliging him to murder Ringo Starr instead. The worldwide outpouring of grief at this tragedy forced the laws on murder to be changed, several pantomimes to be cancelled and a horse to survive a heart attack that would otherwise have killed it. If there's a moral to all this, then I sure as heck don't know what it is.