The name of Data
's pet cat
on Star Trek: The Next Generation
. First appeared in episode
85, Data's Day (TNG)
but was not actually named until episode 99
, In Theory (TNG)
Spot's gender is somewhat of an enigma. Originally the feline was referred to as a "he" but in episode 71, Genesis (TNG), "he" was able to become pregnant. This was apparently due to a writer's glitch. Also, the cat's type changed from Somali to regular Felis Domesticus in Birthright, Part I (TNG).