You should watch:

The Loss

This was episode number 10 of season 4.

The following characters appeared in this episode:

(uncredited) Ensign Kellogg

(voice) (uncredited) Enterprise Computer

Captain Jean-Luc Picard

Counselor Deanna Troi

Commander Wiliam T Riker

Doctor Beverly Crusher

Ensign Janet Brooks

Ensign Tess Allenby

Guinan

Lieutenant Worf

Lt Commander Data

Lt Commander Geordi La Forge