Watch to see how Enceladus' geysers change with time. During its prime and extended missions, Cassini discovered Enceladus' plumes, and then showed that the plumes vary with time as Saturn's gravity squeezes and pulls at the shape of the moon. In the final three years, Cassini will have three ultra-close flybys of Enceladus, using several of them to sample the plumes directly to see if their composition has changed. Also, armed with their new understanding of when the plumes are most active, they plan to fly through the plumes at the point in Enceladus' orbit where they're at their most active. The Enceladus flybys are on October 14 and 28 and December 19, 2015.

Map the north poles of Saturn's icy moons. With the Sun only recently risen on the north poles of everything in the Saturn system, global maps are not quite complete. There has not been an opportunity to fill in these gaps lately, because the most recent phase of Cassini's mission has been focused on the dynamics of atmosphere and rings, with Cassini in a steeply inclined orbit that afforded few opportunities for moon flybys. But beginning in March 2015, Cassini will return to the ring plane, allowing it to perform repeated Voyager-class flybys (by which I mean flybys of 10,000 to 100,000 kilometers distance) of most of the moons, closing up the last gaps in imaging. This is particularly important for Enceladus, where we need to understand why the north pole behaves so differently from the south pole. Some of these flybys will be the closest-ever of some of Saturn's smaller moons. There are two extremely close flybys of Dione on June 16 and August 17, wrapping up work on surveying its gravity. Some of this is "more of the same" type science as in earlier parts of the mission, but with so many targets in the Saturn system, there is a lot of real estate on the mid-sized and smaller moons that is not yet thoroughly explored.

Focus on Saturn's ring "propellers" to help us understand what they can tell us about how planetary systems form. Cassini discovered these "propeller" objects in Saturn's rings, litttle mass concentrations that migrate and shift in ways we don't yet understand. In general, the rings are an ever-changing system. Figuring out why they behave the way they do could help us understand how our solar system transitioned from a disk of disorganized material to nucleating planets.