Sport Relief special. As you'd expect, there are a few changes to watch out for, including having Sport Relief celebrities walk up those famous stairs to accompany the cash-hungry entrepreneurs in their bid for investment. To kick off the episode, funnyman Patrick Kielty lends his support to an improbable-sounding invention - the Sideways bike. Two sisters from Southampton hope the Dragons will see the potential in their bottom-toning prototype, ably... see more