|“||Mom didn't sing nearly as much as she yelled. The only memory of her I haven't purposely wiped out is the one where she left me on Granny's doorstep while you were still in the hospital and disappeared.||”|
|— Monica about her strained relationship with her mother|
Monica is the sister of Jeff Colby and the daughter of Cecil Colby and Dominique Deveraux, who is the half-sister of Blake Carrington. Monica is first introduced as the best friend since high school of Fallon Carrington.
On Thanksgiving, it is established that the Colbys' father, Cesil, is in jail. Monica refuses Fallon's urging to visit him on Christmas, and is mad to discover that Fallon is sleeping with her brother Jeff while still harboring feelings for Michael Culhane. The women have a falling out as Monica accuses Fallon of being self-absorbed and not a good friend. Monica then begins a romantic relationship with Michael.
Monica is horrified when Jeff finally admits his plan to destroy the Carringtons, but she later agrees to help him. Fallon discovers that the Colbys are conspiring against her. On the day of Fallon and Jeff's fake wedding, she makes a show of her trust in Monica to encourage a confession, but Monica stays silent. As Jeff and Fallon's feud goes public after the wedding, Monica cuts ties with Jeff and takes guardianship of her father.
This lasts until Fallon's mother Alexis Carrington arranges a reconciliation between Jeff and Monica. Soon after, Jeff and Monica learn from their grandmother—the former secretary of Thomas Carrington—that their mother, Millie, was fathered by Thomas. Alexis informs them that as Thomas' grandchildren, they are entitled to a portion of his shares in Carrington Atlantic.
In season two, Monica reluctantly hires Kirby Anders to help her open Club Colby. Jeff invites their mother Dominique Deveraux to Atlanta for a reunion a few weeks later. Monica, still furious over their mother's abandonment, calls Dominique and tells her not to come. Jeff is disappointed when she does not arrive, or even call. Dominique eventually appears as Jeff recovers at home. She and Monica clash over Dominique's abandonment, and though Dominique is apologetic, she asserts that Jeff and Monica were better off being raised by their grandmother. Dominique takes a secret phone call, revealing that she has been manipulating Jeff and Monica, and that she has other children in New York.
Monica is vaguely supportive when Jeff and Dominique plot to frame Adam for Jeff's "murder". Later, Monica comes close to learning that Dominique double-crossed Jeff, so Dominique drugs her daughter to delay her investigation while Dominique makes a play to gain control of an absent Jeff's money. Jeff returns, and he and Monica cut ties with Dominique for her machinations. Jeff and Monica are later shocked as Dominique claims responsibility for the explosion that injured Adam Carrington.
Dominique's stepdaughter Vanessa Deveraux arrives in Atlanta on the night of Sam's opening of La Mirage, but Dominique wants to keep Vanessa's identity hidden from Jeff and Monica until she can secure their help for Vanessa's singing career. Monica softens to Dominique on Thanksgiving, agreeing to sign Vanessa to her label and have Dominique and Vanessa over for Thanksgiving. Michael pressures Dominique to tell Jeff and Monica that Vanessa is their step-sister. Dominique convinces Blake to give her incriminating information on Michael, which she uses to silence him. Angry that Dominique is perpetuating the lie and has no intention of confessing, Vanessa reveals to a furious Monica that they are sisters. On the day of Blake's trial, Monica decides to go to New York to open another Club Colby, and invites Vanessa to go with her.
|Dynasty: Season 1 (16/22)|
|"I Hardly Recognized You":||"Spit It Out":||"Guilt is for Insecure People":||"Private as a Circus":||"Company Slut":||"I Exist Only For Me":||"A Taste of Your Own Medicine":||"The Best Things In Life":||"Rotten Things":||"A Well-Dressed Tarantula":||"I Answer to No Man":|
|"Promises You Can't Keep":||"Nothing But Trouble":||"The Gospel According to Blake Carrington":||"Our Turn Now":||"Poor Little Rich Girl":||"Enter Alexis":||"Don't Con a Con Artist":||"Use or Be Used":||"A Line From the Past":||"Trashy Little Tramp":||"Dead Scratch":|
|Dynasty: Season 2 (11/22)|
|"Twenty-Three Skidoo":||"Ship of Vipers":||"The Butler Did It":||"Snowflakes in Hell":||"Queen of Cups":||"That Witch":||"A Temporary Infestation":||"A Real Instinct for the Jugular":||"Crazy Lady":||"A Champagne Mood":||"The Sight of You":|
|"Filthy Games":||"Even Worms Can Procreate":||"Parisian Legend Has It...:||"Motherly Overprotectiveness":||"Miserably Ungrateful Men":||"How Two-Faced Can You Get":||"Life is A Masquerade Party":||"This Illness of Mine":||"New Lady in Town":||"Thicker Than Money":||"Deception, Jealousy, and Lies":|
|Dynasty: Season 3 (6/20)|
|"Guilt Trip to Alaska":||"Caution Never Won A War":||"Wild Ghost Chase":||"Something Desperate":||"Mother? I’m At La Mirage":||"A Used Up Memory":||"Shoot From the Hip":||"The Sensational Blake Carrington Trial":||"The Caviar, I Trust, Is Not Burned":||"What Sorrows Are You Drowning?":|
|"A Wound That May Never Heal":||"Battle Lines":||"You See Most Things in Terms of Black & White":||"That Wicked Stepmother":||"Up A Tree":||"Is The Next Surgery on The House?":||"She Cancelled...":||"You Make Being a Priest Sound Like Something Bad":||"Robin Hood Rescues":||"My Hangover's Arrived":|
- In the original Dynasty series, Monica's friendship with Fallon was not developed at all.
- Monica is the recurring character with the most appearances on Dynasty. She is also one of four recurring characters to have appeared in every season yet.
- Reed Gaudens of Hidden Remote noted early in season three that Hollis was not a series regular "but seriously should be".
- Hollis was cast as Monica the same week she landed the recurring role of makeup salesgirl Harriet on The Marvelous Mrs. Maisel. She said that though both roles are different, they both represent strong female storylines. Hollis worked on the first seasons of both Dynasty and Mrs. Maisel concurrently.
- I Hardly Recognized You. Dynasty. Season 1. Episode 1. The CW.
- A Taste of Your Own Medicine. Dynasty. Season 1. Episode 7. The CW.
- Rotten Things. Dynasty. Season 1. Episode 9. The CW.
- Promises You Can't Keep. Dynasty. Season 1. Episode 12. The CW.
- Our Turn Now. Dynasty. Season 1. Episode 15. The CW.
- Poor Little Rich Girl. Dynasty. Season 1. Episode 16. The CW.
- Dead Scratch. Dynasty. Season 1. Episode 22. The CW.
- Ship of Vipers. Dynasty. Season 2. Episode 2. The CW.
- The Sight of You. Dynasty. Season 2. Episode 11. The CW.
- New Lady in Town. Dynasty. Season 2. Episode 20. The CW.
- Deception, Jealousy, and Lies. Dynasty. Season 2. Episode 22. The CW.
- Wild Ghost Chase. Dynasty. Season 3. Episode 3. The CW.
- Something Desperate. Dynasty. Season 3. Episode 4. The CW.
- Mother? I'm at La Mirage. Dynasty. Season 3. Episode 5. The CW.
- Shoot From the Hip. Dynasty. Season 3. Episode 7. The CW.
- The Sensational Blake Carrington Trial. Dynasty. Season 3. Episode 8. The CW.
- Dynasty power rankings: Sam finds a fitting foil in Kelly Rutherford’s Melissa - Hidden Remote
- Wakeema Hollis Of 'Dynasty' Wants You Know That This 'Overnight Success' Took Years - Bustle