Jamie Winton (Mathew Baynton) works as a bank manager in Slough, England, living with his best friend, Dave Bosley (Joel Fry), and his adoptive mother, Paula (Pauline Quirke).
In Washington, D.C., Rhonda's brother Scotty (Kyle Soller) and his husband, US General Arnold Gaines (Paterson Joseph), are working to stop the comet that will cause the apocalypse.