He first made a one-episode stint on 21 December 2000 before reappearing as a regular cast member and gradually the show's main antagonist from 17 April 2001 to his last appearance on 1 November 2002.

During that time, Trevor frequently clashes with Little Mo's family and proceeds to spark a feud with both her sister Kat (Jessie Wallace) and love interest Billy Mitchell (Perry Fenwick).

Trevor Morgan first arrived in Albert Square, Walford, along with his wife Little Mo Slater (Kacey Ainsworth) around December 2000 to celebrate Christmas with her family.

When Trevor discovers Little Mo plans to join Kat in helping their sister Lynne Hobbs (Elaine Lordan) celebrate her wedding in late 2001, even though she agreed not to do that on his behalf earlier on, he rapes her as a punishment.

Despite strong evidence of domestic violence, corroborated by Trevor's mistress Donna Andrews (Paula Jennings), the mother of his baby son, Sean, the jury at her trial find Little Mo guilty of attempted murder and she is sentenced to eight years in prison.

Boyle observes that Trevor's status as an outsider means that he is also expelled from the community with relative ease, and that there is "a whiff of divine justice" about his eventual death.

[2] Ferns was surprised by the storyline which saw Trevor rape Little Mo, opining that EastEnders's executive producer John Yorke "really put his neck on the line by doing it.

[3] Ainsworth found the Christmas scenes equally difficult, and told Cosmopolitan magazine: "Even though I'm an actress, at that point when I was on the floor, I felt totally and utterly humiliated and sick.

[10] The domestic abuse storyline received critical commendation for its "sensitive account" of sexual violence, however was also condemned for "symbolising the descent of popular television into distressing and inappropriate material.

"[2] Boyle gave the storyline a mixed review, writing that Little Mo's attempted murder conviction served to highlight the inequities of the legal system, yet undermined "the more mundane, persistent realities of domestic violence that the soap – patterned on repetition and the deferral of closure – is otherwise well positioned to deal with.

We carefully consider each case on its merits, in the context of the audience expectations which have been built up, and having regard also to the general limits understood by the watershed concept.

The episode in which Trevor attacked Little Mo over Christmas dinner was watched by 14.5 million viewers, and voted 57th in Channel 4's 100 Greatest Scary Moments.

[13] The storyline attracted so many complaints from the public that the Broadcasting Standards Commission undertook their first study of sex and violence in soap operas in twenty years.

They claimed the depiction of abuse was consistent for the series, and that EastEnders viewers expected that seasonal episodes such as Christmas and New Year would always be "overshadowed by crises".

[14] Ferns was surprised by the strength of reactions to his role, and assessed that it was because of the domestic abuse: "You can have violence on screen and it's kind of an everyday thing but there's something about a man hitting a woman, within the confines of their own home, that people find hard to take.

"[3] The aggression directed at him by members of the public intensified following Little Mo's imprisonment, forcing Ferns to wear a disguise when travelling on the London Underground.

"[15] In 2020, Sara Wallis and Ian Hyland from The Daily Mirror placed Trevor 95th on their ranked list of the best EastEnders characters of all time, calling him "Evil" and his abuse "violent".