Blackadder: The Cavalier Years Blackadder: The Cavalier Years Blackadder: The Cavalier Years is a 15-minute one-off edition of "Blackadder" set during the English Civil War, shown as part of the first Comic Relief Red Nose Day on BBC1, broadcast on Friday 5 February 1988. The show featured all series regulars except Tim McInnerny and Hugh Laurie with Warren Clarke as a guest star. The episode begins in November 1648. King Charles I of England, Scotland and Ireland has already lost the Civil War. Only two men remain loyal to him: Sir Edmund Blackadder (Rowan Atkinson), the sole descendant of the Blackadder dynasty at the
Blackadder Water and joins with that river at the village of Allanton, where Blackadder House and its estate once stood. The Whiteadder then crosses the English Border below Edrington where it joins the Tweed which empties into the North sea at Berwick-upon-Tweed. Blackadder Water Blackadder Water () is a river in Berwickshire in the Scottish Borders area of Scotland, forming part of the River Tweed system. Rising in the Harecleugh Forest plantation just south of the Twin Law cairns, north of the village of Westruther, the headwaters of the Blackadder join with those of the Wedderlie, Edgar, and Fangrist Burns, before reaching