Stewart tries to broker peace between humans and aliens, but as Grieves goes rogue, Stewart finds the future of the entire planet is at stake... and it's all resting on his shoulders. [S,AD]
Stewart's plan to boost alien popularity via social media goes awry - in doing so, he attracts attention from anti-alien resistance fighters who tap into Stewart as a potential mole. [S,AD]
Aliens take over the world but struggle to govern a species as baffling as humans, so they hire a 'Human Liaison' in the UK: Stewart, a hapless twentysomething from the local council. [S,AD]