Part 1 of two. Attwood mediates between the U.S. Government and a faction of the Dominants that wants a peaceful coexistence. Meanwhile, Tom volunteers to be Ed's first test case for a drug that could make Tom human. Tom: Adam Storke. Sloan: Debra Messing.
The team investigates the violent beating of some school boys by a child Dominant (Vincent Berry) whose parents are Homo Sapiens, which leads to some startling speculations. Frank Taylor: Brian McNamara. Attwood: Larry Drake. Ray: Frankie R. Faison.
The team learns that there is a double of Randall Lynch on the loose, and he may be an identical twin or a clone---and therefore, he could be one of many Randall Lynches. Tom: Adam Storke. Sloan: Debra Messing.
Dr. Copeland (Sam Anderson) takes the kidnapped Ed to Alaska to convince him to help revive a destructive flu. Ed escapes---but not before contracting the deadly disease. Ed: Vincent Ventresca. Tom: Adam Storke. Atwood: Larry Drake.
The team travels to an elementary school where it is suspected that the new species is behind a rash of illnesses; meanwhile, Tom meets a young member (Kaj-Erik Eriksen) of his species who wants to do what Tom is doing. Dr. Copeland: Sam Anderson. Tom: Adam Storke.
As Tom and Sloan are pursued, Lewis (James Morrison) finds a way to summon Tom back to him---and reprograms him as a killer. Meanwhile, at Kelly's viewing, Ed sees movement in the corpse. Tom: Adam Storke. Sloan: Debra Messing. Attwood: Larry Drake.
Attwood's superior launches a plan to get to Lewis, using Lisa as the bait, but ends up putting Sloan and Tom (Debra Messing, Adam Storke) in a perilous situation. Meanwhile, Ed makes a startling discovery about Kelly. Anna de Leon: Maria Rangel. Martin: Jordan Lund.
The bombing of a bar, intended to kill a reporter (Dwier Brown), leads Tom and Sloan to Tom's old mentor, a cold and ruthless man who trains the new species for violent missions. Lewis: James Morrison. Sloan: Debra Messing.
Attwood (Larry Drake) retrieves the pillar and takes it to an abandoned warehouse, where he's joined by Tom and Ed to see if the monolith might solve some mysteries. Meanwhile, Sloan and Ray question people who used to live near the Mexican village. Lt. Quinn: James Handy. Tom: Adam Storke. Ed: Vincent Ventresca.
Sloan, Tom and Ed travel to Mexico to search for clues about the origin of the new species, where they make a discovery that may reveal how many of the new humans exist. When they return, Tom investigates his own origins by visiting his boyhood home. Walter: Larry Drake. Tom: Adam Storke.
Lynch (Roger Howarth) continues his killing spree as Sloan and Ray pursue him; and Sloan and Ed may have a clue to the geographical origin of the new species. Tom Daniels: Adam Storke. Walter Atwood: Larry Drake. Det. Peterson: Frankie R. Faison.
Sloan searches for more of the new humans, only to find more puzzles. But she may have found an ally in Tom Daniels---which she needs after Lynch (Roger Howarth) escapes. Det. Masters: Steven Barr. Ed: Vincent Ventresca. Walter Atwood: Larry Drake.
A bio-anthropologist (Debra Messing) learns of the existence of a new species of humans while continuing the research of her mentor, who was murdered while studying a criminal (Roger Howarth) with a "genetic anomaly." Ed Tate: Vincent Ventresca. Tom Daniels: Adam Storke. Walter Attwood: Larry Drake.