All the Presidents' Heads

"All the Presidents' Heads" is the one hundredth and eleventh episode of Futurama, the twenty-third of the sixth production season and the tenth of the eighth broadcast season.

Plot
This episode sees Fry licking George Washington's head and it sending him on a "trip" back to the Revolutionary War. Richard Nixon will play a role.[2] It is believed that other characters will go on other 'trips' to other presidential eras