Series 1, Episode 14
Another back story - this time dealing with the strained relationship between Michael and his ten year old son Walt. When he catches his son receiving knife-throwing lessons from Locke he threatens to kill Locke (I had to laugh, just trying to believe this could even remotely be possible) if he continues to be seen with his boy. Later, the three of them become involved in a fight for survival when Locke rescues Walt from an attack by a polar bear. Elsewhere Charlie becomes obsessed with wanting to read Claire's diary when he finds out she has written about him in it.
Two things I realised whilst watching this episode; Michael's character is an asshole and Kate has a great ass... oh boy does she ever.