The acclaimed drama concludes. In the aftermath of the Silo tragedy Karen feels she and Sam have no future and takes matters into her own hands. Niska and Astrid prepare to return to Berlin, but can Niska really walk away from her family? Joe leaves Laura shell-shocked with a frank admission. Hester seeks revenge and will stop at nothing to hurt Leo.
In a parallel present day, where the latest must-have gadget for any busy family is a ‘Synth’ (a highly realistic humanoid servant that’s transforming the way we live). In hopes of reducing their workload, a suburban family purchases a new Synth only to discover that sharing life with a Synth has quite far-reaching consequences.