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.

When a Rittenhouse sleeper agent in 1941 Hollywood steals the only copy of Citizen Kane, Lucy, Wyatt and Rufus team up with Hedy Lamarr to get it back. Hedy Lamarr turns out to be not only a glamorous movie star but also a scientific wizard whose discoveries led to the invention of Wi-Fi.

When Rufus and Jiya add a fourth seat to the Lifeboat, for the first time ever, Connor Mason joins the team as they travel back to the dusty backroads and smoky juke joints of the Depression-era South to rescue the life and legacy of Robert Johnson – King of the Delta Blues, Godfather of Rock n’ Roll and a man who, legend has it, bought his musical genius from the Devil for the price of his soul. Meanwhile, Agent Christopher keeps Wyatt in the present to execute a dangerous raid on Rittenhouse headquarters.

When the Mothership jumps to South Carolina in 1863, the Time Team partners up with a courageous Union spy and military leader, Harriet Tubman - AKA "The General" - to thwart Rittenhouse's plan to alter the outcome of the Civil War. Back in the present, Rittenhouse hits the team where it hurts the most. Then, Jiya makes a daring escape from Rittenhouse that strands her in San Francisco's Chinatown in 1888 with no way home.

Christmas arrives in the Bunker, and the Time Team is inspired by a visit from their future selves to find a way to try to save Rufus. But when the Mothership jumps to 1848 California, they’re forced to put those plans on hold and chase Rittenhouse back to the Gold Rush, where they encounter one of the era’s most dangerous villains. Then chasing the Mothership to Korea in the winter of 1950, the team helps a stranded, pregnant refugee attempt to escape a tragic fate.