“God is in the Details” is episode ten of season two of Eureka.
Zoe and three friends are at home when they all suddenly lose the ability to speak. Then, Allison starts glowing, as she has become bioluminescent. Some water in an aquarium also turns into what looks like blood.
These are all connected, disparate as they might seem, but many of the Eureka townsfolk suddenly start becoming rather more religious than normal, which means the vicar gets a lot more business than she usually does.
Jo is going on a date with Zane, and Carter has had a sudden flashback, remembering the bit when Henry erased his memory in “Phoenix Rising”.