You should watch:

The Best of Both Worlds: Part 1

This was episode number 26 of season 3.

The following characters appeared in this episode:

(voice) (uncredited) Enterprise Computer
Admiral J P Hanson
Captain Jean-Luc Picard/Locutus of Borg
Chief Miles O'Brien
Counselor Deanna Troi
Commander Wiliam T Riker
Doctor Beverly Crusher
Guinan
Lieutenant Worf
Lt Cmdr Elizabeth Paula Shelby
Lt Commander Data
Lt Commander Geordi La Forge
Wesley Crusher