Ep 2. Part Two

A 7.9 magnitude earthquake devastates Seattle, Wash. -- and as a follow-up, the 8.4 aftershock wreaks even more havoc, even swallowing a moving train, with potentially more devastating aftershocks to come. Dr. Samantha Hill (Kim Delaney), an expert on hidden fault lines, and the president of the United States (Beau Bridges) must work together and race against the clock to save millions of Americans in harm's way.