Being Human: That's What Friends Are For

Syfy's Being Human ended its first season exactly as it should have: with an emphasis on the bond between its three main characters, a fight between two of the supernatural world's finest, and a cliffhanger that could shape Season 2. But it's that first item—the character bond—that really gave the episode depth.
Through flashbacks we learned how Josh (Sam Huntington) and Aidan (Sam Witwer) first met, and that set the stage for Josh's admirable behavior in the present. Josh was in a bad place before Aidan...  
http://www.tv.com/story/25608.html