The final episode can be watched for free online by using the free trial offered by DIRECTV. How can you watch the ‘Surviving Earth’ series finale for free? DIRECTV currently offers a five-day free trial to new users, and it will televise the “Surviving Earth” series finale on NBC. Who will narrate the ‘Surviving Earth’ series finale? Josh Goodman has been the narrator throughout the series, and he will narrate the series finale tonight.