Stardate: 5577.3--While exploring a burnt-out supernova, the U.S.S. Enterprise finds a miniature city called Terratin, and soon discover that it is a lost Earth colony that has mutated because of the supernova's radiation and that the Enterprise crew is beginning to shrink also.
original airdate--November 17,1973
Alien Races: Edoan
Starships: U.S.S. Enterprise NCC-1701
Goofs: Christine's first "help" is heard when her head is underwater, yet is spoken clearly as if not underwater. Afterwards, she says "help" several more times when her mouth can be seen not moving.