Eureka is an underdog? Its the best show on that list!
I'd be all for a mixing of those. My only concern is the writing style for each series is vastly different, so it could get a little... worrying.
Firefly and eureka work well stylistically, but story wise it'd make no sense whatsoever.
I've always wanted to see a CSI, Bones, House crossover, if only so they could have Stephen Fry do his Psychologist bit on Hugh Laurie, with Grissom watching in amusement.
But Grissom is gone for now. Still, would be a fantastic way to reintroduce him.
Haven't seen the terminator series. Is the writing style fitting with Star Trek?