Carter searches for the person who sabotaged an experiment that puts Eureka in danger. "Mirror, Mirror" is the 11th episode of the show's fifth season.
Jack: What do you figure, we going to blow something up or get covered in goo? Jo: Why are you so pessimistic? Jack: Really? Jo: [timidly] Right, I think I'm gonna go with goo. Jack: I'll go with blow something up.