Blackadder Goes Forth of the characters of Lord Flashheart and Bob from the second series episode "Bells" and also an appearance of the famous flying ace Baron von Richthofen. A plot thread in the third episode "Major Star" involves Blackadder's dislike of the silent film star Charlie Chaplin, whom he finds "as funny as getting an arrow through the neck, and then finding there's a gas bill tied to it". In the fifth episode, the anti-German sentiment in Britain during the war is repeatedly referenced. General Melchett orders Blackadder to find out what is behind the leak in top-secret battle plans and immediately,
Spooks (series 3) and guest appearances. Megan Dodds returns as CIA liaison Christine Dale in the first episode. Tim McInnerny recurs as JIC chairman Oliver Mace. McInnerny was better known as a comedic actor, particularly for his role in "Blackadder", but the producers felt that quality made Mace a more menacing character. Richard Harrington plays Will North, Zoe's boyfriend turned fiancé. Ian McDiarmid guest stars as Fred Roberts. The producers noted that McDiarmid played Roberts with the right amount of vulnerability, strength and stubbornness. Indian actor Anupam Kher appears as Harakat in "Who Guards the Guards?". Oyelowo stated that Kher had an "instant