第 1 季 共 13 集
播出时间：1997年10月12日
第 1 集 The Long Goodbye Syndrome
播出时间：1997年10月12日
While trying to get Skraaldians out of New York sewers, Jay uses his Noisy Cricket on one and kills it. Problem is, all Skraaldians are psychically linked and know what Jay did. And every last one will go after him to settle the score.
第 2 集 The Buzzard Syndrome
播出时间：1997年10月19日
Jay and Kay investigate a crashed alien ship in the woods when they encounter Treblor, an alien cop from the Zombarian Retrieval Department. Treblor says the owner of the crashed ship is a fugitive named Z-Ron. While Jay goes out ahead to get Z-Ron, Kay learns Treblor isn't who he says he is.
第 3 集 The Irritable Bow-Wow Syndrome
播出时间：1997年10月26日
A Charnok has to come to Earth and ransacked Jeebs' pawn shop as well as hunting reliable MIB informant, Frank the Pug. After some investigating, Jay and Kay learn the Charnok was trying to buy a Void Density Core from Jeebs, who didn't want to sell it. Frank made off with it during the fight and accidentally swallowed it. Now the MIB have to get the VDC out of him before it detonates and sucks the city into a miniature black hole.
第 4 集 The Alpha Syndrome
播出时间：1997年11月2日
Investigating the theft of a Sintillian heart, Kay learns the culprit is Alpha, his former mentor and the man who left him for dead years ago. But Jay and Kay discover Alpha now has multiple body parts grafted onto his body, becoming even more dangerous.
第 5 集 The Undercover Syndrome
播出时间：1997年11月9日
Jay goes undercover as a Tarkan bodyguard at an alien conference to protect Dirndl, Trade Minister of Tarka, from an alien assassin.
第 6 集 The Neuralyzer Syndrome
播出时间：1997年11月16日
While trying to stop alien thieves known as Chop Shoppers, Jay's accidental use of the Neuralizer erases Kay's memories and makes him think he is sixteen.
第 7 集 The Symbiote Syndrome
播出时间：1997年11月23日
When Kay is infected with Millicrons, Jay takes his place on an assignment to transport a symbiote named Troy to New York City. He has to do it within twenty hours or be permanently absorbed by Troy. But Buzzard returns and is looking to capture the symbiote for his mysterious boss.
第 8 集 The Inanimate Syndrome
播出时间：1997年12月7日
An Inanimate, a shapeshifter capable of disgusing itself as inanimate objects, escapes from prison to Earth. But the MIB get some help from Eileen, an intergalactic cop that stirs up some old feelings for Kay.
第 9 集 The Psychic Link Syndrome
播出时间：1997年12月14日
An insane Alcidian named Forbus is hunting humans, draining them of their bodily fluids. But during the pursuit, Forbus forms a psychic link with Kay, making him feel whatever he feels.
第 10 集 The Head Trip Syndrome
播出时间：1997年12月21日
Jay mistakes a Cerebro-Accelerator for a pair of head phones, making him the smartest man on Earth. However, this will also cause his brain to explode in twenty-two hours. But his advanced brain is MIB's only hope when someone uses time travel to erase the five founders of MIB from existence.
第 11 集 The Elle of My Dreams Syndrome
播出时间：1998年1月11日
Alien dream eaters known as the Vermax attack the crew of a returning NASA space shuttle. When Jay, Kay and Elle arrive at the landing sight, a Vermax attaches itself to Jay and sends him into a deep sleep. Elle enters Jay's dreams to get him to wake up and remove the Vermax.
第 12 集 The I Married an Alien Syndrome
播出时间：1998年2月15日
The Blastula are increasing the temperature on Earth in their plot to colonize the planet.
第 13 集 The Take No Prisoners Syndrome
播出时间：1998年5月17日
Dr. Lupo and other inmates of MIB's prison ward manage to break out and incapacitate most of MIB. Only Jay and the worms can save the day.
