He was voiced by David Fox in the 1991 TV animated series, and by Andy Serkis in the 2011 computer-animated film, the latter who also played Caesar from Rise of the Planet of the Apes and the 2005 incarnation of King Kong.
Captain Haddock sailed over twenty years with his old friend, Captain Chester, before becoming commander of the Karaboudjan where his alcoholism was taken advantage of by his crooked first mate Allan Thompson. Tintin rescued him from the ship and the two friends were barely ever parted again. He is a direct descendant of the 17th century seafarer Sir Francis Haddock, a sea captain under Charles II. He was the captain for two expeditions during his adventures with Tintin, commanding the Aurora in The Shooting Star during the expedition to find the meteorite and the Sirius, Captain Chester's ship that he lent to Haddock to find Red Rackham's treasure. At the end of the latter adventure, Haddock acquired with the proceeds of the sale of his friend Cuthbert Calculus' patent for the Shark-proof submarine, Marlinspike Hall, which once belonged to Captain Haddock's ancestor Francis. Haddock retired from sailing there and invited Tintin and Calculus to indefinitely live there with him.
- His surname's origin seems to differ from person to person familiar to Herge.
- According to author of "Chronology of a Work" Philippe Goddin, the name inspired by the 1931 film "Captain Craddock".
- Herge's first wife Germaine Kiekens, said that "Haddock" came from the English fish dish of the same name.