Maureen "Little Mo" Slater (also Morgan and Mitchell) is a fictional character from the BBC soap opera EastEnders, played by Kacey Ainsworth from 18 September 2000 to 26 May 2006.

Later on, Little Mo develops a relationship with doctor Oliver Cousins (Tom Ellis), though they soon break up after she is accused of hurting Freddie.

However, while her family and friends suspect Little Mo to have hurt her son, the real culprit is revealed to be Billy's little cousin Ben (Charlie Jones).

[4] BBC publicity describe Little Mo as being "timid" and the complete opposite of the loud wheeler-dealer grandmother for whom she was named.

[7] Little Mo first arrived on Albert Square on 18 September 2000, along with her family: father Charlie (Derek Martin), grandmother Big Mo (Laila Morse) and sisters Lynne (Elaine Lordan), Kat (Jessie Wallace) and Zoe (Michelle Ryan), although Zoe is later revealed to be Kat's secret daughter following a family argument.

It soon becomes clear that their marriage was previously troubled, due to Trevor being physically and mentally abusive towards her as a result of his servere mood swings and violent temper.

This is further evident when Little Mo tries to leave her husband, but he deceives her into staying with him and proceeds to isolates his wife from her family – who despise Trevor due to his abusive nature.

However, when he rapes her after she buys a hat to wear to Lynne's wedding which he has forbidden her from attending, she realizes she cannot bring a child into such an environment and goes back on the contraceptive pill.

After Little Mo moves out and has to divorce Trevor, he terrorises her and takes her and Sean, his son with Donna Andrews (Paula Jennings), hostage in the Slater home, which catches fire.

Late one night shortly before their first wedding anniversary, Little Mo is raped by her crossword buddy, Graham Foster (Alex McSweeney), in The Queen Victoria public house.

Around February 2006, Little Mo is seen struggling to cope with Freddie's constant crying but refuses to medicate him for his teething, so she has trouble getting him to sleep.

Freddie gets a head injury in a fight with Bobby Beale (Kevin Curran) so a health visitor visits the Slaters.

She constantly takes Freddie to see general practitioner, Oliver Cousins (Tom Ellis), who moves her to another GP's patient list because he is interested in her romantically.

Freddie is rushed to hospital, where doctors find another head injury, and Social Services suspect Little Mo.

After extensive tests, the doctors discover Freddie has a low platelet count due to an infection, meaning that any minor injury can cause serious complications as his blood does not clot properly.

Oliver suggests she report Ben but she refuses, leading to a nasty scene in the pub when Peggy Mitchell (Barbara Windsor) calls Little Mo a child beater.

In August 2023, Freddie visits Little Mo off-screen after learning the truth about Graham and how the incident with her led to his birth.

[10] Further, Little Mo is featured on Virgin Media's compilation of the all-time 'catfights' and praised for daring to take on her volatile sister Kat.

[12] Little Mo was profiled in Karen Boyle's book "Media and violence: gendering the debates", which discussed her rape ordeal and her abuse by Trevor.

"[14] In 2008, All About Soap included Little Mo and Trevor's domestic abuse plot in their list of "top ten taboo" storylines of all time.