Charlock was a Captain of the Efrafan Owsla, and Woundwort rated him as one of his best captains. Charlock died when he was leading a patrol of Efraran rabbits in pursuit of the Watership Down rabbits Holly, Silver, Buckthorn and Strawberry, who were escaping from Efrafa after being forcibly detained there. When he was crossing the railway to bring the fugitives back, he was run over by a train. The deaths of Charlock and Mallow within a few days of each other resulted in a shortage of experienced Owsla Captains in Efrafa by the time Bigwig arrived.
In the Miniseries, Charlocks makes no appearance, And his Role is Given to Vervain.