Patrick

Patrick is a survivor of the apocalypse and a member of Bryce's Group. He is a minor character introduced in Season 2 of the main show.

Pre-Apocalypse
Not much is known about Patrick's life before the apocalypse, other than at some point he studied to become a doctor.

"What Have You Done?"
When they arrive at the campsite, Patrick tends to Dexter's twisted ankle. He commends Claire on the quality of her treatment of him given the circumstances, to which she states that she merely "read some first aid books."

Trivia

 * Patrick is the first official Doctor to appear in the show.