The finale of The Missing is on tonight, in my opinion the best BBC drama I have seen. There are lots of possible kidnappers/killers but none seem to have a motive. I have a strong feeling that it is Mark Walsh, the British policeman. There is a possibility that he has a link to the family before they knew it and maybe wanted revenge on Tony, hence taking his child and eventually his wife. We never saw the evidence that was given from Malik to Mark. We only saw what Mark gave Tony and the others at the end. So he could have swapped the evidence on the train from England to France? There are many different theory's but I think mine was worth £20 on at 20/1 on Betfair... I think you'll find the price of Mark being the killer is much shorter now. You can get 5/2 at William Hill and betfair have taken their market down. So, the question is, who has taken Oliver Hughes?