Shaun of the Dead co-stars Nick Frost and Simon Pegg will reprise their roles from the comedy film for the animated TV show Phineas and Ferb. The actors will play the characters Ed and Shaun for the upcoming Halloween special. The animation follows Phineas and Herb who use their imaginations to build inventions. Their teenage sister Candace who regular witnesses their inventions is left frustrated at the end of each episode as their Mum never catches them with their dangerous contraptions. Meanwhile the boys’ pet Platypus Perry defeats their arch nemesis Dr Heinz Doofenshmitz each episode. The episode will be broadcast in October 2014.