Ep 15. Public Enemy No. 1.

Flynn has gone back to 1931 and teamed up with gangster Al Capone. Despite the fact that Capone is already a notorious figure in history, Flynn has bigger plans and intends to help Capone take over Chicago and become the most powerful man in the city. Capone's criminal empire is spreading quickly, and Agent Christopher and the Time Team are tasked with stopping him.

Lucy, Wyatt, and Rufus travel back in time in hopes of thwarting Flynn's plan. They arrive just as Capone is about to be arrested on a tax evasion charge, but Flynn's interference has changed the timeline, and Capone is let off the hook by a crooked judge. The Time Team must come up with a new plan to stop Capone and save history from being altered forever.

As they work to track down Flynn and Capone, Lucy discovers that her own grandfather was involved in Capone's criminal empire. She must confront her family's history and figure out how to use this information to stop Capone and save the future. Meanwhile, Rufus is dealing with personal issues, and Wyatt is struggling with the morality of interfering with historical events.

The Time Team manages to get close to Capone and his gang, but things quickly go awry when Flynn shows up and reveals his true intentions. The team is faced with a difficult decision, and they must choose between stopping Flynn and saving Capone or preserving history at all costs.

As they race against time to save the future, members of the Time Team face betrayal and sacrifice, and the consequences of their actions will have far-reaching effects on their own lives and the world as they know it. The episode culminates in a thrilling confrontation that will have audiences on the edge of their seats.

Overall, "Public Enemy No. 1" is a riveting episode of Timeless that showcases the series' blend of historical fiction and action-packed drama. With its engaging storyline, strong performances, and high stakes, this episode is a must-watch for fans of the show.