Dr. Hayden, Morgan, Link and Chongo are fortunate enough to escape the cave, leaving Mu-tan and his men behind as prisoners of the Skeleton Men. They head for their boat, only to be trapped once more by the Skeletal Natives.
Mu-tan has to turn over his gun to the Skeleton Men. While their attention is drawn to the others, Chongo disguises himself as a Skeleton Man and succeeds in knocking a few of them out. Morgan takes a cue from Chongo and a fight begins.
Finally, they reach the lost city again. By carefully studying the map, Dr. Hayden leads Mu-tan to the treasure. As Mu-tan counts his gold and jewels, the Skeleton Men surround them all.
Mu-tan takes Dr. Hayden and his party on board his boat. A proposition is made to Dr. Hayden by Mu-tan...that he helps Mu-tan find the treasure in the lost city of Tobanya, and Leslie will be held ""under protective custody"" until their return.
Mu-tan plans to throw his captives into the lions' den. The Chief of the Skeleton Men intervenes and orders one of them to fight Mu-tan. Link is chosen, and if he wins, their lives will be spared. They fight a tug-of-war over the lions' den.
Morgan, Chongo, Link and Dr. Hayden continue searching for Leslie. They stop to rest a moment and are spotted by the White Savage guards. They manage to escape and discover the entrance to the cave, arriving just in time to save her from a boiling pool.
Morgan, Chongo, Link, Leslie and Dr. Hayden are all Mu-tan's captives once again. Dr. Hayden reassures his group that Mu-tan needs him to read the map to the lost city.
Morgan, Chongo, Link, Leslie and Dr. Hayden make their way to a deserted village. They think they will be able to take refuge there for a while, but Mu-tan had reached the village before them. Upon their arrival, he takes them captive.
In the cave, Dr. Hayden finds his brother's map, which shows where the lost city of Tobanya is located. Suddenly, the earth begins to shake...an earthquake. They all run out of the cave, but Dr. Hayden decides to go back for the map.
Dr. Hayden and his daughter, Leslie, begin their journey to the cave with Morgan, Chongo and Link. After a dangerous trip, they return to the cave.
Danger Island is a live-action adventure serial produced by Hanna-Barbera and originally broadcast in 1968 as a segment on the Banana Splits Adventure Hour. It was filmed in Mexico and directed by future Superman, Goonies, and Lethal Weapon director Richard Donner and featured Jan-Michael Vincent as Lincoln 'Link' Simmons. The series comprises a 3-hour adventure yarn broken down into 36 short chapters. Each chapter is roughly five minutes long and includes a suspenseful cliffhanger ending that is resolved in the next installment.