LightPhoenix said:In fact, that's a big reason why (hidden in case he chooses to use it).Galen is in the show - it would have been revealed in the end of the first season the technomages actually use Shadow technology
This bit of information is also revealed in the the B5 book trilogy, "The Passing of the Techno-Mages" by Jeanne Cavelos (based upon an outline by JMS). However, given that the books take so long to deal with that piece of information, I doubt it would have been revealed at the end of the first season. That would have been too soon.