A scene from “Unfinished Business”

Opening voiceover (for various episodes) by Stein, Jax, Amaya, and Sara

Time travel is real, and all of history is vulnerable to attack. Which is why we must travel through time to stop the spread of these so-called "time aberrations" and to erase their damage to history. We are a team of outcasts and misfits, so please don't call us heroes. We're Legends.