Question: Which British character voiced by Thomas Sangster is one of five characters in a Disney Channel series?
Sentence (from "Phineas and Ferb (season 3)"): The five main characters are: brothers Phineas Flynn and Ferb Fletcher, secret agent Perry the Platypus (who's also the pet of Phineas and Ferb), the evil scientist Dr. Heinz Doofenshmirtz, and the brothers' older sister Candace Flynn.
Relevant evidence: Yes