PILOT (THE RETURN)
EPISODE NUMBER: 101
ORIGINAL AIR DATE: 07/11/2004
WRITTEN BY: Scott Peters and Rene Echevarria
DIRECTED BY: Yves Simoneau

4400 people, assumed to be dead or missing over the past fifty years, reappear in a ball of light.

THE NEW & IMPROVED CARL MORRISSEY
EPISODE NUMBER: 102
ORIGINAL AIR DATE: 07/18/2004
WRITTEN BY: Ira Steven Behr
DIRECTED BY: Helen Shaver

Tom and Diana investigate a 4400 who has used his ability of enhanced reflexes to become a vigilante.

BECOMING
EPISODE NUMBER: 103
ORIGINAL AIR DATE: 07/25/2004
WRITTEN BY: Craig Sweeny
DIRECTED BY: David Straiton

Tom and Diana investigate Oliver Knox, a 4400 suspected of being a serial murderer.

TRIAL BY FIRE
EPISODE NUMBER: 104
ORIGINAL AIR DATE: 08/01/2005
WRITTEN BY: Robert Hewitt Wolfe
DIRECTED BY: Nick Gomez

NTAC races against the clock to stop a group of fanatics targeting 4400s.

WHITE LIGHT
EPISODE NUMBER: 105
ORIGINAL AIR DATE: 08/08/2005
WRITTEN BY: Scott Peters
DIRECTED BY: Tim Hunter

Diana helps Tom break Kyle out of NTAC quarantine, eventually leading them to discover the truth behind the 4400.