The Curse of the Black Spot by a Siren-like creature who marks people with black spots on their palms after they are injured and appears to disintegrate them with her touch after putting them in a trance. Rory Williams receives a cut during a tussle with the pirates, and finds a black spot on his hand, but is prevented from succumbing to the song of the Siren by Amy Pond and the Doctor. Surmising the Siren is using water as a portal, the Doctor instructs the crew to seek refuge in the ship's dry magazine. There, they find Toby Avery, the son of the ship's captain
The Seven Crystal Balls be serialised two pages per week, accompanied by other Franco-Belgian comics. For the first time, the "Adventures" would be in colour from the outset. Hergé assembled a team of artists for the purpose, including Edgar P. Jacobs and Jacques Van Melkebeke, who became the magazine's first editor. Hergé continued at the point where he had left "The Seven Crystal Balls", prior to embarking on "Prisoners of the Sun", although both were published under the title of "" ("The Temple of the Sun"). Rather than re-serialising the story from its beginning, he began the new magazine with a summary of the