Clyde Langer

Clyde Langer is a fictional character played by Daniel Anthony in the British children's science fiction television programme The Sarah Jane Adventures. He first appears in the second and third episodes, Revenge of the Slitheen, and is a replacement for the character Kelsey Hooper, who had been featured in the series premiere.

Within the narrative of the series, Clyde is a friend of alien investigator Sarah Jane Smith (Elisabeth Sladen) and her son Luke (Tommy Knight), and helps the Smiths to investigate alien activity in and around London. Through his friendship with Luke, popular Clyde becomes more confident in his own intelligence and artistic ability, staying on at sixth form, while also helping Luke—a genetically engineered boy genius—better adapt to the cultural norms of being a teenager. From the show's second series onwards, Clyde's storylines in particular have suggested romantic tension with his fellow alien investigator, classmate and friend Rani Chandra (Anjli Mohindra).