![View Poster Image](https://image.tmdb.org/t/p/w342/2uakcFFbUaUDNWSqsfNLz028mwn.jpg)
![View Poster Image](https://image.tmdb.org/t/p/w342/2uakcFFbUaUDNWSqsfNLz028mwn.jpg)
Episode 4 - Single Strand
Air Date: Jan 24, 2014
As Alan risks killing Peter in a desperate effort to cure him, Walker teams with a mysterious young researcher to survive their quarantine. Jordan discovers her Rapid Response test is flawed.
![View Image](https://image.tmdb.org/t/p/w342/y0bANl6mf8Nr2800wJaSWyq0A2n.jpg)