You should watch:

Descent: Part 2

This was episode number 1 of season 7.

The following characters appeared in this episode:

(uncredited) Crippled Borg drone
Captain Jean-Luc Picard
Counselor Deanna Troi
Commander Wiliam T Riker
Crosis
Doctor Beverly Crusher
Ensign Zandra Taitt
Goval
Hugh
Lieutenant Worf
Lieutenant Barnaby
Lt Commander Data/Lore
Lt Commander Geordi La Forge
Salazar