1x11 - Voltron: The Third Dimension

Pidge is sent to planet Glacia to get Thunder-Ice, a new discovery that can stop Nova-99 from destroying a solar system. Zarkon manages to get Amalgamus to send a cyborg named I.G.O.R. with Pidge. Not surprisingly, I.G.O.R. turns on Pidge and tries to destroy him and Green Lion.