The dynamics of the Pluto-Charon sytem are reviewed from a historical perspective. Although Pluto's orbit crosses Neptune's, an intricate system of nested resonances keeps these planets apart. Pluto's orbits is apparently chaotic as well. Pluto always keeps the same face turned toward Charon, and vice versa. Tides also damp Charon's orbital eccentricity and inclination. Precession of Pluto's orbital plane causes Pluto's obliquity to vary periodically from formally prograde to retrograde. Pluto is probably an original member of the Solar system, but not an escaped satellite of Neptune. The Voyager II encounter with Neptune, the final Pluto-Charon mutual events, and the next generation of telescopes are bound to reveal some surprises. ¿ American Geophysical Union 1989