After learning of the true nature of the Visitors goals, Erica Evans of the Fifth Column decided to conduct an aggressive campaign against Visitor High Commander Anna. This involved infecting the last of the Live Aboard's with a virus that would corrupt their genetic code thus, in essence, creating DNA bombs that would have corrupted the DNA Bank. However, Joshua learnt of the goal after one of the infectees collapsed onboard the New York Mothership leading to the subjects being terminated after their genetic material was harvested. This combined genetic material was later injected into Tyler Evans to prevent him from dying as he was deemed a suitable breeding candidate for Lisa. ("Uneasy Lies the Head")