The Time Team chases Rittenhouse to a stock car race in the 1950s where Wyatt learns that his favorite race car driver is actually a Rittenhouse sleeper agent on a mission to destroy the American car industry. To stop the Rittenhouse plan, Wyatt, Lucy and Rufus team up with Wendell Scott, the first African-American NASCAR driver.
After barely escaping an explosion at Mason Industries, Wyatt and Rufus chase the Mothership back to a French battlefront during World War 1 to rescue Lucy from Rittenhouse. There, they discover that Lucy has recruited Marie Curie, the famous French scientist and the only person ever to win two Nobel Prizes, to help save the life of a wounded American soldier, only to learn that the soldier is Lucy’s own great-grandfather who Rittenhouse is bringing to the present to be their leader.
With one of our heroes’ lives on the line, the team chases Flynn to 1954 through the paranoid corridors of Joe McCarthy’s Washington D.C., en route to a secret, once-a-generation meeting of Rittenhouse leaders. While there, Lucy must wager the ultimate sacrifice to save history as we know it.
Lucy, Wyatt, and Rufus decide to take matters into their own hands, but are caught off guard when Flynn lands in 1931 Chicago to call in a favor from notorious gangster Al Capone. Hot on Flynn’s trail, our heroes try to enlist the help of famed lawman, Elliot Ness, in pursuit of Al Capone after Flynn aids him in avoiding justice. A clue leads the team to a crucial revelation about Rittenhouse.
Flynn disappears to 1927 France on the day that Charles Lindbergh completes his transatlantic flight, so Rufus, Lucy and their new soldier scramble through the City of Lights and team with a young reporter to keep history intact. Locked in an undisclosed location, Wyatt gets a visit from Agent Christopher, and the pair is left wondering if their enemies are closer than they realize.
Wyatt convinces Rufus to steal the Lifeboat for an unauthorized mission to prevent Wyatt’s wife’s killer from ever being born. Lucy must cover for them in the present, as Agent Christopher discovers the ship is missing and Anthony Bruhl makes an alarming confession.
Flynn teams up with legendary outlaw, Jesse James. Together they cut a bloody swath across the American frontier. Hot on Flynn’s trail, Lucy, Wyatt, and Rufus enlist the help of an iconic Marshal to help bring the fugitives to justice.
Lucy’s situation grows desperate after she’s captured by Flynn and taken to the 1893 Chicago World’s Fair. In their dogged pursuit of Lucy, Wyatt and Rufus fall into a sinister trap.
A stunning turn during the American Revolution prompts Lucy, Wyatt, and Rufus to question whether they’ve been fighting on the wrong side this whole time. While Agent Christopher prepares for the worst back in present day, the team encounters the Father of the Country, makes a dubious pact, and confronts the possibility they may not be a trio for long.
On the run with the bank-robbing Barrow gang, the team needs to gain the trust of ill-fated lovers Bonnie and Clyde in order to find out Flynn’s target in the Depression-era South. While Agent Christopher tracks down a lead in present day, Lucy, Rufus, and Wyatt risk getting caught in the crossfire, suspecting that whatever Flynn’s after may be a key piece of the whole puzzle.