Spoilers

2x17-- Nothing Important Happened Today

• Sophie gives birth.
• Mandy goes on her Slayer Quest.
• Connor and Salome face a tough reality.

2x18-- Two Ships

• Wesley returns to Palo Alto, again working as a rogue demon hunter.
• Gord finally finds out the secret Connor's been hiding.
• Freema Agyeman makes her first appearance as Grace Kendrick, a Watcher with a secret.

2x19-- Sisters

• A great deal of history of the three Hellgods is revealed.
• Connor has a vision of Holtz during a tense moment.
• The final players of the battle arrive in Palo Alto.