2003. 2004. 2007. Unable to contemplate the future, Dexter looks back on his and Emma's intertwined past — and gets a visit from some familiar faces.

Cast: Ambika Mod, Leo Woodall, Amber Grappy, Brendan Quinn, Essie Davis, Tim McInnerny, Jonny Weldon, Adam Loxley, Eleanor Tomlinson, Billie Gadsdon, Joseph Pharoah, Clea Martin