CBS All Access original series returns Thursday to kick off its third season after a year-and-a-half hiatus, and only ET premieres an exclusive sneak peek from the first episode. To jog your memory, in the season 2 finale, Michael Burnham (Sonequa Martin-Green) and the USS Discovery crew blasted off 930 years into the future, arriving in the year 3188, where the Federation has been depleted following a mysterious apocalyptic event called The Burn. In the exclusive clip from the season 3