Season One is the very first season of Men in Black: The Series. The first episode, The Long Goodbye Syndrome, aired on October 11, 1997, and the season finale, The Take No Prisoners Syndrome aired on May 16, 1998. However, the episodes were not evenly spread out, and the last four episodes aired months apart.
|01||The Long Goodbye Syndrome||Duane Capizzi||Frank Paur||October 11, 1997||01|
| On a mission to help stop a Skraaldian multiplication in a sewer, there was a struggle against one. J fires a Noisy Cricket at it, blowing it up. Now, he's a wanted target for every other Skraaldian on their home planet, Skraal. And since the Skraaldians have a hive mentality and are locked on to his DNA, It won't be easy for J to escape. Only K can get him out of it. But will he in time? And why does nobody seem worried?
|02||The Buzzard Syndrome||Steve Roberts||Nathan Chew||October 18, 1997||02|
| Jay and Kay investigate a crashed alien ship in the woods. Soon they encounter Treblor, an alien cop from the Zombarian Retrieval Department. Treblor claims that the owner of the crashed ship is a dangerous fugitive named Z-Ron. While Jay goes out ahead to capture Z-Ron, Kay learns that "Treblor" isn't who he says he is.
|03||The Irritable Bow-Wow Syndrome||Mark Amato||Frank Paur||October 25, 1997||03|
| Agents J and K investigate a Charnock landing site at a farm. Their only clue is a skin. After Jeebs and Frank argue at Jeebs' pawnshop, the real Charnock appears disguised as a fat, grumpy man. Jeebs shows him the Void Density Core, which is like a miniature black hole, sucking anything within a three-mile radius. He tells him that it isn't for sale, but he doesn't listen. He threatens to activate the core but Jeebs knocks it out of his hand. Frank puts the core in his mouth to carry it. But, out of shock, he accidentally swallows it! Now the Charnock is after him! Can J and K save Frank from getting "sucked inside myself!"?
|04||The Alpha Syndrome||Alexx Van Dyne||Michael Goguen||November 1, 1997||04|
| Investigating the theft of a Sintillian heart, Kay learns the culprit is Alpha, his former mentor, who stole a Verulian Cosmic Integrator and left Kay for dead years ago. But Jay and Kay discover that Alpha now has multiple alien body parts grafted onto his body, becoming even more dangerous.
|05||The Undercover Syndrome||Steve Roberts||Dennis Woodyard||November 8, 1997||05|
| Jay goes undercover as a Tarkan bodyguard at an alien conference to protect Dirndl, Trade Minister of Tarka, from an alien assassin. But with two dozen alien races present, it's like looking for a needle in a haystack.
|06||The Neuralyzer Syndrome||Mark Amato||Dennis Woodyard||November 15, 1997||06|
| J wants to know more about K. But K doesn't want J to know much. A pair of alien war-profiteers named the "Chop-Shoppers," who steal flying machines and sell them to black markets, appear and attempt to steal a spacecraft disguised as a Dry-cleaning store. J is distracted by an old friend from his pre-MIB life, but after the reunion was broke up by K's neuralyzer, he drops it. J picks it up. As they go after the Chop-Shoppers, K says, "You can't go home again." They fail to catch the Chop-Shoppers. Then, while not paying attention, J neuralyzes K to the age of sixteen! With K's memory gone, how will he and J stop the Chop-Shoppers?
|07||The Symbiote Syndrome||Alexx Van Dyne||Nathan Chew||November 22, 1997||07|
| When Kay is infected with Millicrons, Jay takes his place on an assignment to transport a teenaged 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.
|08||The Inanimate Syndrome|| Thomas Pugsley|
|Michael Goguen||December 6, 1997||08|
| An Inanimate, a shapeshifter capable of disguising 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.
|09||The Psychic Link Syndrome||Steve Roberts||Nathan Chew||December 13, 1997||09|
| 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.
|10||The Head Trip Syndrome|| Thomas Pugsley |
|Michael Goguen||December 20, 1997||12|
| 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 alien hating bigot uses time travel to erase the five founders of MIB from existence.
|11||The Elle of My Dreams Syndrome||Greg Weisman||Frank Paur||January 10, 1998||10|
| 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.
|12||The I Married an Alien Syndrome||Steve Roberts||Dennis Woodyard||February 14, 1998||13|
| The Blastula are increasing the temperature on Earth in their plot to colonize the planet. Meanwhile, Jay believes that Kay may be an alien spy for the Blastula.
|13||The Take No Prisoners Syndrome||Dean Stefan||Dennis Woodyard||May 16, 1998||11|
| 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.
- In North America, six episodes were released on VHS. They have not been released on DVD, nor has the complete season been released.
- In Australia, this season was released in two volumes (first has seven, second has six).
- Twelve days later, the UK received the same volumes.