Public Enemy No. 1

When he first meets Eliot Ness, Wyatt gave him the aliases for the team of "Connery", "Costner" and "De Niro". The real Sean Connery, Kevin Costner, Robert De Niro starred together in The Untouchables (1987) portraying Jim Malone, Eliot Ness and Al Capone, respectively.

While battling Chicago gangster Al Capone in 1931, the time travelers seek help from real-life lawman Richard James Hart, but Hart lived in Homer, Nebraska, which is over 400 miles from Chicago. He could not have covered that distance unless they let him see and use their time machine, which they evidently did not since Hart remains ignorant of time travel.

References The Untouchables (1987)