Weaver is sent from 2149 with the Phoenix Group. He is a hypochondriac and does not like it in Terra Nova.
Before Terra Nova
Weaver is a wealthy man who works for Lucas Taylor and his employers. In "Occupation", he overlooked the training of a powerful military force, the Phoenix Group, from a balcony in a dome in Chicago. He told Lucas that everything was in order to invade Terra Nova and Hope Plaza, though he expressed his concern that the latter will be too well guard because of the Eleventh Pilgrimage's departure. However, Lucas assured him that they have the best army that money can buy. They successfully seized Hope Plaza, and the public were told that there was nuclear contamination, allowing their invasion of Terra Nova to go unnoticed.
At Terra Nova
Weaver came to Terra Nova with the Phoenix Group and aided Lucas Taylor with the plot to strip the prehistoric Earth of its resources. He did not like it at Terra Nova, as he claimed to being bitten by giant bugs, and referring to one as a "Spider-Snake with wings". When Dr. Elisabeth Shannon treated his wounds, she told him that she had just infected him with a parasite. Although it is later revealed that she was bluffing, and there was no parasite, she would not give him the cure unless he got Jim Shannon out of the Brig. The plan was successful. Later, Weaver was assigned to go into Hope Plaza in 2149 with the cargo in the transport, not knowing that the transports had been switched, and Jim Shannon was in the transport without the desired cargo. In Hope Plaza, Weaver was seen trying to sell the cargo to some men, and just before he opened the back of the truck, Jim Shannon was seen injecting the unknown cargo and hiding behind an object. When the truck was opened up, the cargo woke up, and was revealed to be a juvenile Carnotaurus. The Carnotaurus crushed one of the men with its foot, while Weaver and the other man were hiding behind a transport. Weaver told the man that the coast was clear, and the man walked around the corner, only to be eaten by the Carnotaurus. Weaver fled around the Plaza, and found Jim Shannon, then held a gun up to him. Just as Weaver was about to shoot, the Carnotaurus' jaws closed around Weaver just in time, and Jim Shannon hurries back to the portal just in time.
Weaver was an eager and selfish businessman who was more concerned for his own safety, rather than that of others, to the point where he would send them to their deaths to save his own skin. He was incredibly paranoid, and was extremely disturbed by the unfamiliar flora and fauna of the Cretaceous. His determination to complete the mission he was hired for is based solely on how much money he will earn from it, enough to purchase his own dome in 2149; caring nothing about the damage to Terra Nova, decimating the wildlife, or even the many lives that will be lost, he goes so far as to shoot dead a harmless Brachiosaur simply because it was in the way. He was forceful against anyone in his way, but was hampered by his fear of the unknown, being described by Dr. Elisabeth Shannon as a highly suggestive hypochondriac.