You should watch:

Birthright: Part 1

This was episode number 16 of season 6.

The following characters appeared in this episode:

(as Siddig El Fadil)Dr Julian Bashir

(uncredited)Morn

Ba'el

Captain Jean-Luc Picard

Counselor Deanna Troi

Commander Wiliam T Riker

Doctor Beverly Crusher

Gi'ral

Jaglom Shrek

Lieutenant Worf

L'Kor

Lt Commander Data/Dr Noonien Soong

Lt Commander Geordi La Forge