The Tunnel: Season 1 review. British detective Karl Roebuck and his French counterpart Elise Wassermann are reluctantly thrown together to investigate a dead body found at the mid-point of the Channel Tunnel.
corona means crown but that is some mexican modism I don't know what does that mean?
Corona discharge is a luminous partial discharge from conductors and insulators due to ionization of the air, where the electrical field exceeds a critical value. A high local electric field ionizes the air and causes a discharge.