I enjoyed this episode enough aside from the cheap cheap cheap paint effect for an alien.
THe team brings back a device that starts to infect the Base personnel and the building itself. its up to Sam and the Doctor to reverse its effects. But wait. Its a pretty typical "It's trying to communicate with us" episode,. Fairly entertaining but the worst thing is that they just use day-glow paint as the alien species. its pretty cheap and shoddy to say the least