This text presents excerpts from a novelization, "Doctor Who and the Sea-Devils," which details a maritime crisis involving mysterious sinkings and the emergence of hostile, reptilian creatures known as Sea-Devils. The narrative follows The Doctor and his companion, Jo Grant, as they investigate these events, which also involve the imprisoned villain The Master and a misguided prison governor, Trenchard, who is secretly aiding him. The plot encompasses the disappearance of ships and an oil-rig crew, the Doctor and Jo's narrow escapes from capture by both the Master and the Sea-Devils, and the subsequent efforts by Captain Hart of the Naval Base to address the growing threat. Ultimately, the Doctor is forced to destroy the Sea-Devils' base to prevent them from waking up their dormant kin, leading to a grim victory and the escape of the Master.