The other Sharon runs a program giving both generations of Cylons freedom of choice. She then announces her intention to return to the main Cylon base to discover who she really is. Adama convinces many of the returners to go with her and both groups of Cylons.
When members of the Earth Protectorate take Baltar hostage, Adama, working with Sharon’s Cylons are able to rescue him. Afterwards, Sharon, the Cylons, and the returners leave Galactica and return to the Cylon’s main base ship.