Loved this episode. Jordi and Ro become ghosts as the Romulan test device blows a gasket! Now stuck in another phase of reality the plot resolves around their struggle to become noticed by the rest of the crew who believe they are dead!
A great start clearly setups the episode for a great story. The middle act is well thought out and presented as we see the duo struggle to establish contact, first believing they are dead and then discovering they are not. The intrigue and exploration provides the avenue to find a solution to alert the crew that they are still alive. This need becomes rather pressing when we discover that Romulans are planning to repay the Enterprise by destroying her in an act of Romulan betrayal.
This need rises further when another Romulan is shown to be in the same predicament. Trailing them, he goes aboard the Enterprise to stop their attempts to alert the crew. This part of the middle act cranks up the excitement and suspense level nicely as we worry whether they will warn the crew in time. Their final battle ends quite spectaularly. Worth the watch on its own.
The final act starts as the Romulans leave the Enterprise boobytrapped when they go to warp. Will Ro and Jordi be able to warn the Enterprise as Data bumbles about unable to work out the clues being left by the pair? Or will the Enterprise go up in smoke and Jordi and Ro be left to eternal torment?!!!!!