You should watch:

Face of the Enemy

This was episode number 14 of season 6.

The following characters appeared in this episode:

(uncredited) Ensign Kellogg

Captain Jean-Luc Picard

Commander Toreth

Counselor Deanna Troi

Corvallen Freighter Captain

Commander Wiliam T Riker

Doctor Beverly Crusher

Ensign McKnight

Ensign Stefan DeSeve

Khazara Pilot Palteth

Lieutenant Worf

Lt Commander Data

Lt Commander Geordi La Forge

Subcommander N'vek