Bells (Blackadder) marks the first appearance of the Bob/Kate and Flashheart archetypes that appear again in "Blackadder Goes Forth". Rik Mayall, who played Lord Flashheart, allegedly designed the character's costume himself. John Lloyd has said that Mayall virtually rewrote his part to feature "loads of jokes", which annoyed the writers, Curtis and Elton. It was the only episode of the series to feature location filming, at Wilton House in Wiltshire. The music performed as Blackadder courts "Bob" is Vaughan Williams' "Fantasia on Greensleeves". In 1993, in conjunction with Comic Relief, this episode was given away free on cassette tape with boxes of
Blackadder Goes Forth with toy soldiers, which he sweeps nonchalantly from trench to trench and then into a rubbish bin, while listening to Blackadder's plea to get out of the big push on the telephone. The series recalls a number of famous historical events of the war, such as the Christmas truce of 1914. Blackadder recalls the event: "Both sides advanced further during one Christmas piss-up than they did in the next two and a half years of war." References are also made to the popular culture of the era, as well as the previous series. The episode "Private Plane", sees the return