"Glimpse" is my favorite episode of the still young season 4.5 - it had a great central threat, it did some nice, light work on the various relationships, it had some good jokes, and it gave plenty to do for the two main guest stars.
Yay! Go Team Eureka!
Oh, there's also this (he said, as nonchalantly as possible):
But really, this episode was almost completely stolen by Wil Wheaton, making his return as Dr. Parrish. One of the best ways to shake up a show like Eureka is to bring in a character whose energy completely contrasts with that of the cast. In previous cycles, that's generally meant bringing in someone mysterious and possibly sinister - James Callis last year, Eva Thorne before that - but Dr. Parrish is something else entirely: he's just a massive asshole. Wheaton is pretty damn brilliant in the role, giving no quarter to Fargo or Carter in his interactions with them while also revealing just why he's so thoroughly antisocial. His brief flirting with Holly was also great, being charming in the way that only a dude who is a total dick can be, and bodes very well for the mooted love triangle between Fargo, Holly, and Parrish.
Thanks, Alasdair! I think you're going to be very pleased with the rest of season 4.5.