As the investigation moves forward a new group of four, animal head wearing, eco-terrorists post a video online. Saga is having some relationship "issues".

A sunken boat containing skeletal remains is found, that appears to be related to the eco-terrorist case. Martin's son is taken into hospital in a serious condition.

A chemical plant is attacked which threatens to contaminate a water source. Saga realises living with a partner is harder than she thought. Martin looks into Saga's past.

Martin visits Jens in prison and seems to be getting to him. As they re-interview witnesses Saga suspects a statement has been tampered with. Laura regains consciousness and remembers what her assailant looks like.