Perez rushes to the scene of the explosion to find Tosh dazed but unharmed. He issues a warrant for Connor's arrest, to the outrage of Rachel Cairns. The complexity and size of the bomb suggests Connor was planning some kind of attack. The team speak to those who knew him in search of extremist beliefs. Jamie, Murray and Lloyd reject any notion that Connor is capable of violence, but a despairing Danny admits environmental issues made his son angry. Meanwhile, Sandy searches for William Rodgers' reason for being in Shetland.

S7 Ep4 60min