Dr. Thomas "Tommy" Oliver (b. 1979 as Thomas Marshall) is the longest-serving Power Ranger of all time. He started as a transfer student at Angel Grove High School who was brainwashed by Rita Repulsa to become the Green Ranger and fought the Mighty Morphin Power Rangers, serving as the central antagonist of the five-part miniseries "Green With Evil". After the Rangers freed him from Rita's spell, Zordon created the White Ranger powers as a replacement for the depletion of the Green Ranger's energy, and the White Ninja Ranger of the Ninja Rangers, he is also the main protagonist of Mighty Morphin Power Rangers, and secondary character of Mighty Morphin Alien Rangers. Later when the team discovered the Zeo Crystal, Tommy was chosen to become Zeo Ranger V Red of the Zeo Rangers, he is also the main protagonist of Power Rangers Zeo. During the events of Power Rangers Turbo he briefly becomes the first Red Turbo Ranger and leader of the Turbo Rangers, giving his powers to T.J. Johnson retired as Ranger. Many years later Tommy returns in Power Rangers Wild Force, leading a special mission with the Veteran Red Rangers against the remnants of the Machine Empire. Years later Tommy graduated from college, he discovered the Dino Gems and became a teacher at Reefside High, becoming the Black Dino Ranger and mentor of the Dino Rangers, he is also the main protagonist of Power Rangers Dino Thunder. Retroactively, he is also referred to as the Mighty Morphin Green Ranger or Green Mighty Morphin Ranger, Mighty Morphin Green Ranger or Green Mighty Morphin Ranger, as well as Zeo Red Ranger or Red Zeo Ranger, though these are in reference to the show, as opposed to proper labels. He has also been labeled Turbo Red Ranger, as the Dino Thunder Black Ranger or Black Dino Thunder Ranger , a variation on his in-show label. Tommy also returns in Power Rangers Super Megaforce, leading the Legendary Rangers to help the Mega Rangers fight against the Armada and the remnants of Emperor Mavro's thousands of X Borgs. Many years later, Tommy form his own family, he returned in Power Rangers Super Ninja Steel along with the other Legendary Rangers, helping the Ninja Steel Rangers against Lord Draven and his army of Robo Rangers.