DS9 "Rejoined" on H&I.
In a longer version of the scene where Dax sees Lenara Kahn leave. Dax looks up and shakes her fist and yells "Khan!!!!"
ENT "Rogue Planet" on H&I.
If what Archer was seeing was actually a changeling in Human form and not a illusion, then why didn't anyone else see her when they approached Archer from behind?