1. Once Upon a Time in the City of New York  

First aired: 9/25/1987    Production Code: 001

The series begins when Catherine Chandler becomes a victim of mistaken identity and is viciously attacked and left for dead in Central Park. A shadowy figure named Vincent rescues her and takes her to a mysterious Tunnel World that exists below the city streets of New York City to recuperate. During this time, Catherine develops a strong bond with Vincent and later she discovers that Vincent is half man/half beast. Later, Catherine's new job with the District Attorney puts her life in peril and somehow Vincent is able to sense when she is in danger.

2. Terrible Savior  

First aired: 10/2/1987    Production Code: 004

A subway slasher that kills with claws and leaves the victims looking as if they were mauled by a bear is on the prowl. When Catherine finds out about the case she begins to suspect that perhaps Vincent is the slasher. This lack of trust begins to strain their relationship. Meanwhile, the real culprit, begins to get uncomfortable when Catherine begins to investigate him.

3. Siege  

First aired: 10/9/1987    Production Code: 003

While attending a party, Catherine catches the eye of megabucks developer, Elliot Birch who begins to wine and dine her. Vincent realizes that Catherine has met a man and must deal with the fact that she's beginning to fall in love. Meanwhile, elderly people are being threatened out of their homes and Vincent and Catherine begin an investigation.

4. No Way Down  

First aired: 10/16/1987    Production Code: 005

When Catherine and Vincent get caught in the middle of a gang war, Vincent is blinded during an explosion and becomes seperated from Catherine. When he awakens he discovers he has become a captive of a street gang that is holding him hostage. Later, he escapes and must find his way back to the tunnels despite the fact that he can't see.

5. Masques  

First aired: 10/30/1987    Production Code: 007

On Halloween night, the only night that he is safe above ground, Vincent goes above to attend a fancy gala honoring an Irish writer named Brigit O' Donnell. Meanwhile, Catherine attends the same party unaware that danger lurks behind masks as Brigit has become the target for a kidnapping.

6. Beast Within  

First aired: 11/6/1987    Production Code: 006

Mitch Denton, a man who grew up in the tunnels and was a childhood friend of Vincent, returns to New York and becomes the center of an ongoing investigation that Catherine is working on. This leads to a near fatal confrontation, when Mitch shoots Catherine.

7. Nor Iron Bars a Cage  

First aired: 11/13/1987    Production Code: 008

Catherine is offered a prestigious job in Rhode Island but has a hard time accepting it as it would mean leaving New York and Vincent. Meanwhile, two scientists seeking prestige, drug and capture Vincent and hold him hostage in a cage for scientific expirements.

8. Song of Orpheus  

First aired: 11/20/1987    Production Code: 009

Father's past is revealed when he goes above for the first time in over thirty years to see a friend. When he arrives at his destination, he stumbles upon a murder and is quickly arrested and charged with murder. Vincent summons Catherine's help as they unravel Father's mysterious past.

9. Dark Spirit  

First aired: 11/27/1987    Production Code: 010

A suspicious death that Catherine is investigating leads her to the world of the occult and voodoo. Later, the man suspected of the murder also turns up dead. Meanwhile, Catherine seeks help from a professor who has secretly put a voodoo curse on her. After a series of frightful bizarre incidents, Catherine's worst fears begin to get the best of her.

10. A Children's Story  

First aired: 12/4/1987    Production Code: 002

When one of the children of the Tunnel World, Kipper witnesses a bizarre kidnapping of a young boy, he goes to Vincent who has Catherine investigate a foster home that is secretly selling children to the highest bidder.

11. An Impossible Silence  

First aired: 12/18/1987    Production Code: 011

When Laura, a deaf tunnel dweller, witnesses a murder she must decide whether or not to come forward and exonorate the man who has been wrongfully arrested for the murder. When she finally chooses to testify she soon finds herself at the mercy of the murderer, despite Catherine's efforts.

12. Shades of Grey  

First aired: 1/8/1988    Production Code: 012

Mouse, one of the tunnel dwellers receives the silent treatment after admitting to stealing from above. However, when Vincent and Father become trapped in a cave-in, the other tunnel dwellers debate whether or not to turn to him for help. Meanwhile, Catherine's romantic past with Elliot Birch leads her to seek help from him.

13. China Moon  

First aired: 1/15/1988    Production Code: 013

Chinatown is the setting of a "Romeo and Juliet" like story of a woman, who is friends with Vincent, and has fallen in love with one man but through an arranged marriage has become engaged to the grandson of a very powerful man, who intends to invade the tunnels with an army.

14. The Alchemist  

First aired: 1/22/1988    Production Code: 014

Paracelsus, a former friend of Father's who has been exhiled, has been selling a deadly hallucinatory drug in the world above. Meanwhile, Catherine has volunteered to go undercover on this ongoing drug investigation and turns to Vincent for help. Father and Vincent soon must decide how to handle Paracelsus.

15. Temptation  

First aired: 2/5/1988    Production Code: 015

A conflict of interest arises when Joe becomes involved with a woman who works for a firm that the DA's office has under investigation. Meanwhile, Vincent takes a trip to a lower cavern to retrieve a gift for Catherine in honor of their one year anniversary of when they first met.

16. Promises of Someday  

First aired: 2/12/1988    Production Code: 016

Catherine gets a new co-worker at the D.A.'s office and soon discovers that he has a connection to the Tunnel World. It seems that he is Father's long lost son and childhood friend of Vincent's, who has returned to New York after a 20 year absence.

17. Down to a Sunless Sea  

First aired: 2/19/1988    Production Code: 017

Catherine's ex-fiance, Steven Bass, resurfaces and becomes friendly with Catherine again and appears to have alterior motives. As, she allows him back into her life despite their rocky past, Vincent begins having dreams of disaster connected to Catherine and her rekindled relationship.

18. Fever  

First aired: 2/26/1988    Production Code: 018

While exploring a secluded section of the tunnels, Mouse uncovers a treasure ship that had sunk centaries prior. This quickly throws the Tunnel dwellers in an uproar as greedy Cullen demands his fair share. Meanwhile, Mouse's gift to Catherine of a golden necklace, catches the eye of an unscrupulous antiques dealer.

19. Everything is Everything  

First aired: 3/4/1988    Production Code: 019

A Gypsy boy, Tony Ramos, cons Catherine and runs off with her purse. Later, she has another run-in with Tony, when he shows up at her doorstep, singing a sad story about how he is istrying to reverse unjust banishment of his family before a Gypsy court. She soon realizes his story is true and turns to Vincent for help.

20. To Reign in Hell  

First aired: 3/18/1988    Production Code: 020

Catherine receives an unexpected visitor on her balcony, a visitor who hardly turns out to be Vincent but a servant of Paracelsus who sets into motion a plan to lure Vincent to a lower section of tunnels in order to kill him and then proceed to overthrow Father and take over the Tunnel World.

21. Ozymandias  

First aired: 4/1/1988    Production Code: 021

Elliot Burch's dream of building the Burch Tower is beginning to become a reality for him, however, it has turned into a nightmare for those living below as the construction threatens the discovery of the Tunnel World. Meanwhile, Elliot makes a bold move and proposes marriage to Catherine.

22. A Happy Life  

First aired: 4/8/1988    Production Code: 022

The anniversary of her mother's death leads Catherine into a deep depression which brings to the surface all of the pain that she endures for not being able to share her life with Vincent. This leads Vincent to make a painful decision, to end his relationship with Catherine.