You should watch:

The Price

This was episode number 8 of season 3.

The following characters appeared in this episode:

(voice) (uncredited) Enterprise Computer
Captain Jean-Luc Picard
Chief Miles O'Brien
Counselor Deanna Troi
Commander Wiliam T Riker
Daimon Goss
Doctor Beverly Crusher
Devinoni Ral
Dr Arridor
Lieutenant Worf
Leyor
Lt Commander Data
Lt Commander Geordi La Forge
Premier Bhavani
Seth Mendoza
Wesley Crusher