When a group of children scavengers known as the Flies obtain some toxic canisters, Ark II must recover and dispose of them.
After finding a group of people who believe in slavery, Jonah is captured and himself enslaved. Then it is up to Ruth, Samuel and Adam to free them and expose the leader as a fraud.
The crew of Ark II must save a wild boy who is being hunted like an animal by local tribes.
When Samuel builds a robot to help the Ark II crew with their mission, the robot starts acting on it's own ideas.
Jonah risks his life to save Samuel after Samuel is taken over by a computer with the ability to control minds.
The crew of Ark II must stop an old army tank that is reeking havoc in the region.
When an old time capsule containing a cryogenically frozen man is opened, the man awakens determined to rebuild his financial empire.
The Ark II crew encounters a settlement which exiles it's sick and elderly as useless because they are deemed unable to contribute.
A boy who does not like the way his fellow villagers are being treated, tries to help them by joining the crusade of a character calling himself Robin Hood.
During a drought, Fagin and his band of scavengers called the Flies, return and capture the Ark looking for a 20th century device they believe can make it rain.
The Ark II crew aids a rich community which face a shortage of food and water after squandering their resources.
The Ark crew meet a group of children with mysterious mental powers.
The Ark II crew helps a community who is battling a mysterious epidemic.
The Ark is attacked by a man calling himself Don Quixote who believes the Ark is a ""white dragon"" he must slay.
When the Ark crew comes across a community where people seemingly live forever, Ruth and Adam begin aging rapidly.
The original producers of ARK II discuss how ground breaking the series was for its time. It was one of the first live action children's shows that aired on Saturday Mornings where programming was dominated by cartoons. It taught lessons relevant to the time and each episode had a dose of moral teaching to go with it.