Star Trek: The Next Generation (1987): 4x18
Identity Crisis
Stardate: 44664.5. Geordi and a former crew mate begin evolving into bizarre creatures when they return to a planet both of them were on during an Away Mission five years earlier.
4 - 1The Best of Both Worlds (2) Sep. 24, 1990
4 - 2Family Oct. 01, 1990
4 - 3Brothers Oct. 08, 1990
4 - 4Suddenly Human Oct. 15, 1990
4 - 5Remember Me Oct. 22, 1990
4 - 6Legacy Oct. 29, 1990
4 - 7Reunion Nov. 05, 1990
4 - 8Future Imperfect Nov. 12, 1990
4 - 9Final Mission Nov. 19, 1990
4 - 10The Loss Dec. 01, 1990
4 - 11Data's Day Jan. 07, 1991
4 - 12The Wounded Jan. 28, 1991
4 - 13Devil's Due Feb. 04, 1991
4 - 14Clues Feb. 11, 1991
4 - 15First Contact Feb. 18, 1991
4 - 16Galaxy's Child Mar. 11, 1991
4 - 17Night Terrors Mar. 18, 1991
4 - 18Identity Crisis Mar. 25, 1991
4 - 19The Nth Degree Apr. 01, 1991
4 - 20Qpid Apr. 22, 1991
4 - 21The Drumhead Apr. 29, 1991
4 - 22Half a Life May. 06, 1991
4 - 23The Host May. 13, 1991
4 - 24The Mind's Eye May. 27, 1991
4 - 25In Theory Jun. 03, 1991
4 - 26Redemption (1) Jun. 17, 1991