This is the first episode with its altered theme music which includes a voice over explaining the visitors.
Footage of Mike Donovan chased on horseback by a Visitor fighter is re-used from V: The Mini-Series. Notice he is waving a Visitor laser gun rather than the handgun he had been using before and after this scene.
The room Lydia was tried is the master control room. It was redressed for this episode. (Notice the "rock blanket" covering the control panels).