You should watch:

In Theory

This was episode number 25 of season 4.

The following characters appeared in this episode:

(uncredited)Alien Bassoonist

(uncredited)Thorne

(uncredited) Lt Van Meyter

(voice) Enterprise Computer

Captain Jean-Luc Picard

Chief Miles O'Brien

Counselor Deanna Troi

Commander Wiliam T Riker

Doctor Beverly Crusher

Ensign McKnight

Guinan

Keiko O'Brien

Lieutenant Worf

Lt Commander Data

Lt Jenna D'Sora

Lt Commander Geordi La Forge