I recognized all of them, eventually, but I'm not sure I would've recognized any of them outside the context of this thread except Robert Picardo...and even then, I probably would've recognized him first as Mr. Woolsey from Stargate SG-1, Atlantis, and Universe before I thought of the Emergency Medical Hologram, even though he was by far my favorite character on Voyager (and yes, of course I remember Seven of Nine -- he had better lines, while she had better curves).