When Dr. Emory Erickson, the inventor of Transporter technology comes aboard the Enterprise to test his latest idea which, if it works, will make it possible to transport people over inter-planetary distances Trip is keen to meet him. As the work starts however it seems as if something isn't quite right; he is insistent that only he can do the required work and won't even let Trip take a look at his notes. When they enter an empty area of space where they are due to carry out the experiment something strange happens, some sort of entity appears on board and when it comes into contact with a crewman that man dies. It soon becomes clear that the experiment was just an excuse to get Enterprise to that part of space; Dr Erickson lost his son in a transporter accident fifteen years before and he believes that because of the properties of space in that area it will be possible to rematerialise him.
After several multi-part action packed episodes this one felt a little slow. It seemed a little too obvious that the great Dr Erickson wouldn't be quite as great as everybody thought. I was a bit surprised when Captain Archer agreed to continue with Dr Erickson's plan even though he'd lied to him and it has already caused the death of one crewman. The ending wasn't quite as I expected and that is a good thing, although I won't spoil it I think the way it ended was right.