In the late 1800s, a kind and generous Ebenezer Blackadder is visited the Ghost of Christmas Past, who shows him visions of his ancestors, and the future of the Blackadders if he does not follow the family tradition. The second special was broadcast on Friday 23 December 1988. In a twist on Charles Dickens' A Christmas Carol, Ebenezer Blackadder is the "kindest and loveliest" man in England. The Spirit of Christmas shows Blackadder the contrary antics of his ancestors and descendants, and reluctantly informs him that if he turns evil his descendants will enjoy power and fortune, while if he remains the same a future Blackadder will live shamefully subjugated to a future incompetent Baldrick. This remarkable encounter causes him to proclaim, "Bad guys have all the fun", and adopt the personality with which viewers are more familiar.
It's New Year's Eve 1999, and Blackadder makes a bold claim to his contemporaries. He claims Baldrick has built a time machine with which Blackadder will get historical evidence. What no one knows is that Baldrick really has invented a time machine, with one slight flaw. That sends Blackadder and Baldrick on a millennium's worth of adventure. Blackadder: Back & Forth was originally shown in the Millennium Dome in 2000, followed by a screening on Sky One in the same year (and later on BBC1). It is set on the turn of the millennium, and features Lord Blackadder placing a bet with his friends – modern versions of Queenie (Miranda Richardson), Melchett (Stephen Fry), George (Hugh Laurie) and Darling (Tim McInnerny) – that he has built a working time machine. While this is intended as a clever con trick, the machine, surprisingly, works, sending Blackadder and Baldrick back to the time of the dinosaurs, where they manage to cause the extinction of the dinosaurs, through the use of Baldrick's best, worst and only pair of underpants as a weapon against a hungry T.Rex. Finding that Baldrick has forgotten to write dates on the machine's dials, the rest of the film follows their attempts to find their way back to 1999, often creating huge historical anomalies in the process which must be corrected before the end. The film includes cameo appearances from Kate Moss and Colin Firth.