Notes: One-Eye Pete and his gang now have both rings. They also have Tinker as a prisoner aboard the submarine. However, Sexton Blake is hidden on the vessel and sets his faithful assistant free. Together they try to take over the ship but fail and are forced out of the conning tower. The submarine dives, leaving them floating alone in the mid-Atlantic. They climb onto a stray torpedo, fearing that it might explode at any moment.
Notes: One Eye Pete and his gang discover that the rings, when looked into both at once, reveal a map that discloses the location of pirate treasure. The island on which it is buried has since sunk to the bottom of the sea but with his submarine the crook can, at last, retrieve the loot. However, Sexton Blake overhears One Eye Pete's plan and hurries ahead to the sunken island where he finds the wreck of the pirate ship. He and Tinker discover the treasure but suddenly the ghostly figure of a pirate materialises before them!
Notes: Sexton Blake and Tinker pursue the crooks to Nigeria. They catch up with the enemy plane just as a storm hits. With their instruments damaged, they crash into the tree tops. When they follow a trail to a village, they see that the crooks have been captured by the natives.
Notes: Tinker is captured by Ah Sing and his ape but makes a break for it and runs up a spiral staircase. Unfortunately, the stairs end in space and the lad finds himself falling. Meanwhile, Sexton Blake follows Gant's trail and leaps on the American. Tinker, who has fallen into a chimney, emerges from a nearby fireplace and joins the fray. The buddhas are on a desk in the room ... but it suddenly starts to sink into the floor!
Notes: Sexton Blake and Hoo Sung tell Ah Sing that they've already secured three of the fourth buddhas. Ah Sing cliams to know where the fourth is and, throwing a smoke bomb for cover, he and his ape flee in Hoo Sung's car. The Chinese scientist reveals that he also knows where to find the buddha — it's in the keeping of Sheik Abdul Djan at El-Barim on the Persian Gulf. He also reveals that the four buddhas once stood behind the throne of Kauli; and there can never again be a kingdom of Kauli unless they are restored. Furthermore, Hoo Sung is the Prince of that lost country! After handing Elmer Gant to the police, Blake, Tinker and Hoo Sung set off to El-Barim in the Flying Disc. They find that Ah Sing has got there first; and Sheik Abdul's house is burning!
Notes: After Ah Sing attacks, Hoo Sung plunges the Flying Disc into the sea and submerges. He steers the craft to nearby land, then takes off and flies over the enemy plane. Sexton Blake shoots the tip of its wing off and Hoo Sung lowers a grapple that fastens onto the plane.
Notes: Ah Sing and the ape, Gibo, bail out of their plane and parachute to safety. Crossing the border into China, they meet with a gang of bandits and join forces with them. Meanwhile, Sexton Blake and Hoo Sung follow their enemy's trail, steering the Flying Disk over a land mine.
Notes: The Flying Disc is crippled by the land mine and Sexton Blake and his allies are knocked unconscious. Ah Sing claims the fourth buddha and flees. Blake, Tinker and Hoo Sung set off in pursuit, driving overland while Hoo Sung, atop the vehicle, repairs a broken rotor. The bandits cross a ravine via a rope bridge. As the Flying Disc follows, Hoo Sung slips and falls.
Notes: Sexton Blake and Tinker are captured by hostile Indians and will be executed. However, Little Crow repays his debt by freeing them. They flee northwards and float downriver on a log. Little Crow reveals that there is oil in Pine City that they can use to refuel the flying disc.
Notes: Sue Carroll, a Rhodesian, takes a job as a widow's companion as a means to return to South Africa. Her employer, Mrs Harmon, is transporting her husband's body there for burial. But Mrs Harmon is acting strangely and Sue finds herself being followed by Bob Charter, formerly of the South African police. On the voyage, Sue is drugged each night by the widow and, just before arrival at Capetown, is shocked to discover that her employer is actually a disguised man! Knocked unconscious, she awakens in the African veld where she witnesses Harmon trying to purchase a farm from a couple named Danby. She then sees Charter shoot Danby dead but is herself blamed for the killing. A cable to England brings Tinker to Capetown where he finds Sue but they are both then captured by the Harmon gang. They are temporarily rescued by Charter — who Sue is mistaken about — but before too long he also falls into the hands of the villains. Meanwhile, after the reported death of Tinker, Sexton Blake arrives in South Africa to investigate. He discovers that all the parties concerned seem to be searching for the proceeds of a robbery. Infiltrating the gang in the guise of a prospector, the detective works from within to encourage the jealous rivalries between the villains but before his plan is complete the police, following up his leads, mount a raid. The gang is captured but the mystery of Widow Harmon remains until Blake provides the solution.
Rating: ★★☆☆☆ An exciting adventure which, unfortunately, is let down by a too heavily manufactured and unbelievable outcome.