Excellent and probably my favorite episode of all.  I must disagree with the previous post on one point.  Ethan Vigil did have something very important to do during that "2 special hours" every 24 hours; he worked on his lifelong goal of a purpetual motion device.  He also benefitted by losing weight, looking and feeling younger, stronger, and healthier.  The key to this protaganist is he was not evil and had no bad intentions.  This is an excellent episode.  BTW Friday the 13th the Series was an excellent show, I call it the precourser to the X files, and that being said, The Night Stalker would be the precourser to Friday the 13 the Series.  
