Portrayed by Tracy Scoggins, the character was introduced on Dynasty in the November 1985 two-part episode "The Titans" as the lawyer daughter of wealthy California CEO Jason Colby (Charlton Heston) and his socialite wife, Sable (Stephanie Beacham).

Hollis began playing Monica in "I Hardly Recognized You", the October 11, 2017 premiere episode of the Dynasty reboot series.

[8] The Desert Sun described Monica as a lawyer "determined to make it in a man's world [who] can't understand the inequalities that confront her.

[8]The Colbys of Los Angeles come to Denver to celebrate a new business venture with oil tycoon Blake Carrington (John Forsythe) in the 1985 Dynasty episodes "The Titans - Parts 1 and 2".

Monica tries to convince her cousin Jeff Colby (John James) to let his ex-wife Fallon go, since she and Miles are in love, in "Moment of Truth".

Monica offers to help Jason again in "Family Album", but is forced to accept that her father only takes men seriously.

Blake Carrington's half-sister, Dominique Deveraux (Diahann Carroll), asks Monica to help her learn if Jason is the one buying up stock in her company, Titania Records.

In accepting the job, Monica has run afoul of Titania vice president Neil Kittredge (Philip Brown), who was demoted to make way for her.

Monica is doubtful in "Fallen Idol" when Miles tells her he witnessed Jason in a romantic embrace with Jeff's mother and Sable's sister, Francesca (Katharine Ross).

Monica meets blind singer Wayne Masterson (Gary Morris) and pitches him to Neil, which leads to another argument between them.

With Jeff and Fallon planning to marry in Los Angeles, Monica is worried when Miles refuses to get away to New York in "My Father's House".

Not ready to talk about Neil, Monica is pleasantly surprised when Jason asks her to come back as General Counsel of Colby Enterprises.

When Arthur is unable to tell her what happened to her son, Monica calls Constance, who confirms that Scott is indeed her child.

Sable tries to convince Cash and Monica that Scott will be better off away from Adrienne, who has had addiction issues and made suicide attempts.

Adrienne tells Cash he can have a divorce but not Scott, assuring him that a messy trial would hurt the satellite project as well as his and Monica's reputations.

The Colbys are newly wealthy, and executive producer Sallie Patrick said that setting them up as competition for the Carringtons would help the show to explore race, class, and gender issues.

[11] Hollis was cast as Monica the same week she landed the recurring role of makeup salesgirl Harriet on The Marvelous Mrs.

[4] Delia Harrington of Den of Geek wrote early in season one that "Unfortunately, Monica's only qualities so far fall squarely in the black best friend trope".

"[13] Andrea Reiher of Brit + Co called Monica "far more devious than anybody knew" when she pretends to oppose Jeff in "Promises You Can't Keep" but is really looking for revenge against the Carringtons for her family falling apart in her youth.

"[19] Monica is still holding a grudge against her mother for abandoning their family when Dominique returns in "New Lady in Town",[20] but Jeff manages to broker a truce.

[22] She comes to the brink of discovering her mother's duplicity, and Dominique drugs her to delay her investigation, but Gaudens notes that "Monica's too smart.

[23] Jeff Colby's sister Monica is introduced in the series premiere "I Hardly Recognized You" as the best friend since high school of Fallon Carrington (Elizabeth Gillies).

[13][14] Monica is horrified when Jeff finally admits his plan to destroy the Carringtons in "Promises You Can't Keep", but she later agrees to help him.

[17][18] Fallon's mother Alexis Carrington (Nicollette Sheridan) arranges a reconciliation between Jeff and Monica in "A Line from the Past".

[30] Jeff and Monica reveal their Carrington heritage in "Dead Scratch", and declare their intention to force a sale of the company.

[31][32] In season two, Monica reluctantly hires Kirby Anders (Maddison Brown) to help her open Club Colby in "Ship of Vipers".

[33] In "A Temporary Infestation", Fallon and Monica's new business venture threatens Jeff and Michael's secret connection to the devious Ada Stone (Katherine LaNasa).

[22] In "Something Desperate", Jeff and Monica are shocked as Dominique claims responsibility for the explosion that injured Adam Carrington (Sam Underwood).

[40][23] In "The Sensational Blake Carrington Trial", Monica decides to go to New York to open another Club Colby, and invites Vanessa to go with her.

Dominique's heartfelt eulogy and promises to be a better mother begin to thaw her icy relationship with Jeff and Monica.