Robert Livingston takes a first pass at the Declaration of Independence. Rosa Parks settles in for an uncomfortable bus ride.

Meriwether Lewis shares news of his upcoming travels with his long-suffering wife. Larry presses George Washington for answers.

Larry crashes a party in Boston Harbor. Jonesy makes a stop on the Underground Railroad. The Wright Brothers prepare for their first flight. Senator Joe McCarthy calls out his fellow congressmen for their problematic conduct.

Bob Woodward receives some questionable intel. Henry Ford is forced to take a local mensch out for a test drive. Bachelor president James Buchanan tries his luck with the ladies. Vaccine pioneer Jonas Salk makes his mother a little too proud.

Larry plays a key role during the showdown at the O.K. Corral. President Lincoln receives advice from his Chief of Staff, Lawrence Butterfield. President Johnson recruits Butterfield to help convince a grieving Mary Todd to move out of the White House.