At Göbekli Tepe, the oldest known megalith in the world, Graham questions if simple hunter-gatherers alone could have built such an advanced structure.
Graham discovers a fascinating pattern that may connect the spectacular megalithic temples of Malta, which he believes to be much older than reported.
Christo drops in on Parker at his office and gets a personal tour of his massive operation, Mitch and Doumitt reveal what claim life is like off the clock and Tyler teaches Christo how to drive a rock truck.
Graham visits ancient mounds in North America and wonders if they contain astronomical significance — or even warnings of an apocalyptic climate event.
Graham visits Gunung Padang, an Indonesian archeological site, to find proof of a lost civilization — and the potential cataclysm that wiped it out.
Few scholars have investigated the Bimini rock formation off the coast of Miami, once fabled to be the road to Atlantis — but Graham dives right in.
The author returns to Turkey to explore Derinkuyu, an ancient underground city and survival bunker that could shelter thousands in times of crisis.
In the home stretch of construction, Chip and Jo focus on perfecting the details of the castle. A design issue in the kitchen spurs Chip to insist on a last-minute change order fixing countertops and windows, and Jo gets a surprise at the Silos.
Hosted by Suzanne Whang, the show takes viewers behind the scenes as individuals, couples and families learn what to look for and decide whether or not a home is meant for them.
When a devoted mother vanishes from home, a series of grisly roadside discoveries take police on a hunt for a killer; detectives follow a path of greed and desperation until a shocking twist leads to a culprit with a bizarre motive.
Twitch and Thrash wonder if they're the only Terrans on Earth. Their family, Optimus Prime, and Bumblebee help seek answers and find new allies! Meanwhile, Mandroid captures Dot and Megatron. Can the larger group become a team and save their friends?
As the Malto family get used to its new members, Bumblebee quickly learns that his mission to train the Terrans won't be as easy as he thought.
Craig goes to extreme lengths to keep up with the fall fashion trends.
While out on a mission to capture three Mini-Cassette bots, Megatron and Optimus Prime have a disagreement about G.H.O.S.T.'s treatment of Decepticons.
Robby backs out of Alex's traditional Wakwak hunt, so Alex shares his family history with Bumblebee, while Twitch, eager to gain her own traditions, encounters "Dad2" - Wheeljack.
G.H.O.S.T. Special Agent Schloder pursues Twitch after mistaking her for a Deception. Meanwhile, Dot is put through G.H.O.S.T. orientation, where she learns that her employer's intentions may not be what they seem.
The Terrans' erratic behavior may be affecting Mo and Robby's anxiety about their first day at their new school. Or it could be something far worse...
Thrash is impatient with the family rules and convinces Mo to push their boundaries. But when a Decepticon needs their help, Mo and Thrash find themselves playing by a far more dangerous set of rules.