Mark, Sarah‘s husband, is a good guy and good teacher. And throughout the series, his life is ripped apart. He tries incredibly hard to make the right decisions, but he is continuously dragged into darker and darker spaces by making the wrong ones.

About Tom Ellis

Welsh-born actor Tom Ellis starred as Dr. Oliver Cousins in long-running British soap opera "EastEnders." Additionally, he played Gary Preston on "Miranda" for two seasons and has appeared on "Merlin" and "The Catherine Tate Show." He played Thomas Milligan in the 2007 "Doctor Who" season three finale, "Last of the Time Lords."