Subterraneans: Part 2 (S05E06)

The team know they have their man - now all they have to do is prove it. As they collect the damning evidence, their suspect disappears and shortly afterwards, so does his wife. The team realise that the murders took place in order to prevent the truth of the killer's secret life from reaching his wife. In a bid to prevent her being hurt by the revelations, she is going to be his next victim. (iTunes)