The phrase "catches the act" means to witness or discover someone doing something wrong or illegal. Its antonyms include "misses the act," which means to not see or discover the wrongdoing, and "overlooks the act," which means to see it but choose to ignore or tolerate it. Another antonym is "approves the act," which means to endorse or support the action. The opposite of catching the act can also be expressed as "prevents the act," which means stopping someone from performing a wrongful or illegal action before it can be discovered. Overall, the antonyms of "catches the act" represent different ways of responding to wrongdoing or illegal activity.