Star Trek - trivia 16

1) In the episode "The City on the Edge of Forever", who steps through a portal in time and erases the Enterprise from history?

a) Spock
b) McCoy
c) Kirk

2) Who goes back in time to try to undo the changes in order to bring back the Enterprise?

a) Spock & Kirk
b) Kirk
c) McCoy

Check comments for the answers.