You should watch:

The Drumhead

This was episode number 21 of season 4.

The following characters appeared in this episode:

(uncredited)Jones

(uncredited) Ensign Kellogg

Admiral Satie

Admiral Henry

Captain Jean-Luc Picard

Counselor Deanna Troi

Commander Wiliam T Riker

Doctor Beverly Crusher

J'Ddan

Lieutenant Worf

Lt Commander Data

Lt Commander Geordi La Forge

Nellen

Sabin Genestra

Simon Tarses