Star Trek: Deep Space Nine

Treachery, Faith and the Great River (7x6)

Air date: Nov 04, 1998

Stardate: Unknown Odo must get a cloned Weyoun, who wishes to defect, back to Deep Space Nine without their runabout being destroyed by Jem'Hadar troops. Odo also learns that a virus is slowly wiping out the changeling Founders.