You should watch:

Conspiracy

This was episode number 24 of season 1.

The following characters appeared in this episode:

(credit only)Wesley Crusher
(credit only) Lieutenant Tasha Yar
(voice) (uncredited) Enterprise Computer
Admiral Aaron
Admiral Gregory Quinn
Admiral Savar
Captain Tryla Scott
Captain Rixx
Captain Walker Keel
Captain Jean-Luc Picard
Counselor Deanna Troi
Commander Wiliam T Riker
Doctor Beverly Crusher
Lieutenant Geordi La Forge
Lieutenant Worf
Lt Cmdr Dexter Remmick
Lt Commander Data