1x17 Half Life (2)
First Aired: Feb. 18, 2005 on NBC
Summary: In a rare crossover with several casts of Third Watch, Dr. Stephen Connor and his team heads to NYC to uncover a multiplying virus before it spreads anymore. Stephen teams up with the NYPD to find patient zero, the one who is carrying the disease and spreading it around the city.
Guest Stars[no credits found]