Blackadder: Back & Forth is a 1999 science fiction comedy short film based on the BBC period sitcom Blackadder that marks the end of the Blackadder saga. It was commissioned for showing in the specially built SkyScape cinema erected southeast of the Millennium Dome on the Greenwich peninsula in South London. The film follows Lord Edmund Blackadder and his idiotic servant, Baldrick, on a time travel adventure that brings the characters into contact with several figures significant to British history.

Plot

At Blackadder Hall in 1999 Lord Blackadder (Rowan Atkinson) is entertaining four guests on New Year's Eve. He informs them he has built a time machine using plans drawn by Leonardo da Vinci and wagers £10,000 each that he can bring back any item from history they ask for. Archbishop Melchett (Stephen Fry), Archdeacon Kevin Darling (Tim McInnerny), Major George (Hugh Laurie) and Lady Elizabeth (Miranda Richardson) agree to this and request he brings back a Roman centurion's helmet, wellingtons worn by the Duke of Wellington on the day of the Battle of Waterloo, and an ancient, reeking, stinking pair of 200-year-old underpants. The whole thing is actually a scam, as Blackadder has, in fact, had Baldrick (Tony Robinson) retrieve the items from his stores, and the time machine is just a prop. Blackadder stages the time machine travelling through time for his guests, with himself and Baldrick hiding inside, but when he opens the door he finds it has actually worked.