|Behind the scenes|
|First Appearance:||Red Rackham's Treasure|
|Last Appearance:||Red Rackham's Treasure|
Doctor A. Leech is Captain Haddock's doctor who never appears in any Tintin book. He sends Haddock a note stating that he cannot drink or bring any alcohol on board the Sirius. This note is written in Red Rackham's Treasure.