Niska is living as a fugitive in Berlin, while the other Synths are laying low in the UK.

Athena arrives in the UK; Niska's consciousness assessments begin.

Mia and Ed's relationship is threatened; Things looks bleak for Niska when Laura calls a surprise witness.

Mia is forced to take drastic action; Hester and Leo locate the silo; Pete locates the valuable stolen Seraph.

Athena challenges Milo over his ethics, and is shocked when he reveals his plan; Max starts a new community of synths.

Mattie asks Max to help save Leo from Hester's influence; Toby receives a disturbing message.

Hester seeks revenge on Leo; Karen takes matters in her own hands; Joe makes a shocking confession to Laura.