Blackadder: Back & Forth is a 1999 British 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.

In a 1999 interview, Richard Curtis described it as "an irreverent trek through British history – a time travel adventure story consisting entirely of people who are either rude or stupid." Rowan Atkinson and Tony Robinson reprised their roles as the series' core characters Blackadder and Baldrick, respectively. In an interview, Atkinson stated that making a Blackadder film had always been an ambition. Joining Atkinson and Robinson are other main cast members from the last three series, Stephen Fry, Hugh Laurie, Tim McInnerny and Miranda Richardson.