You should watch:

The High Ground

This was episode number 12 of season 3.

The following characters appeared in this episode:

Alexana Devos
Boy
Captain Jean-Luc Picard
Counselor Deanna Troi
Commander Wiliam T Riker
Doctor Beverly Crusher
Kyril Finn
Lieutenant Worf
Lt Commander Data
Lt Commander Geordi La Forge
Policeman
Waiter
Wesley Crusher