Rogues of Sherwood Forest is a 1950 Technicolor adventure film from Columbia Pictures, directed by Gordon Douglas, and starring John Derek as Robin, the Earl of Huntingdon, the son of Robin Hood, Diana Lynn as Lady Marianne, and Alan Hale, Sr. in his third Robin Hood film role as Little John during a 28-year period; he had played the part opposite Douglas Fairbanks in 1922 and Errol Flynn in 1938, one of the longest periods over which a film actor played the same major character.

His henchmen fix a faulty protective cap to the Flemish Knight's lance, who has challenged Robin, the Earl of Huntingdon, to a joust.

Having returned from the Crusades, Robin and Little John once again recruit the now aging Merrie Men, who wage a successful guerrilla-type war throughout the realm.

They cleverly use intelligence provided by messages attached to Lady Marianne's carrier pigeons to aid them in their successful campaign to defeat King John.

Robin and the Archbishop of Canterbury are able to compel the defeated King John to seal Magna Carta, establishing the rights of all Englishmen.