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).