Blackadder appeared in more than one of the Blackadder series and/or specials. These are: Ben Elton's arrival after the first series heralded the more frequent recruitment of comic actors from the alternative comedy era for guest appearances, including Robbie Coltrane, Rik Mayall (who had appeared in the final episode of the first series as "Mad Gerald"), Adrian Edmondson, Nigel Planer, Mark Arden, Stephen Frost, Chris Barrie and Jeremy Hardy. Elton himself played an anarchist in "Blackadder the Third". Gabrielle Glaister played Bob, an attractive girl who poses as a man, in both series 2 and 4. Rik Mayall plays Lord Flashheart,
Blackadder Goes Forth Wallis and Lee Cornes, who had played minor roles in prior series, appeared briefly again in the fourth series as well. This series of Blackadder was one of the first television programmes in Britain to be made and transmitted with stereo sound, using the NICAM digital system, even though most viewers could only afford, or were only able to receive due to their location, the standard FM mono audio carrier signal. The series was directed by Richard Boden and all interior scenes were shot at BBC Television Centre in front of a live studio audience. Rowan Atkinson recalls that the