Dick Deadeye, or Duty Done is a 1975 British animated musical comedy film directed by Bill Melendez and designed by Ronald Searle,[1][2] based on the 19th century comic operas of Gilbert and Sullivan.

[3] The comically convoluted plot, by Robin Miller and Leo Rost, with additional material by Gene Thompson and Victor Spinetti, is a pastiche of many of the Gilbert and Sullivan operas, particularly Trial by Jury, The Sorcerer, H.M.S.

Pinafore, The Pirates of Penzance, Patience, Iolanthe and The Mikado, in which the protagonist, Able Seaman Dick Deadeye (voiced by Spinetti), is sent by Queen Victoria on a quest to recover the "Ultimate Secret" from the Sorcerer, who has stolen it.

The music is borrowed from many Savoy operas, with new or modified lyrics by Robin Miller and orchestrations updated in a contemporary popular style by conductor Jimmy Horowytz.

Queen Victoria sends Dick Deadeye, a sailor, to recover the "Ultimate Secret" from two thieves, the Sorcerer and his reptilian henchman, the Shameleon, who are trying to sell it to the Pirate King.

Dick goes for backup to headquarters, the Hexagon ("Here's a how-dee-do"), finding the Captain and the Major-General ("I am the very model of a modern major general").

Dick arrives at the Sorcerer's shop and asks for a potion to make him handsome ("Sprites of earth and air"); he tries to grab the Secret, but it falls through the window into the basket of Little Buttercup, a buxom seller of ribbons, laces and marine supplies.

Poo agrees to return the Secret to the Sorcerer in exchange for learning his tricks, but the pirates drag them to "The Queen's Neck".