List of EastEnders characters introduced in 2006

Oliver Cousins, played by Tom Ellis, is a Walford doctor. He first appears in episode 3092, first broadcast on 30 January 2006. His last appearance is in episode 3159, first broadcast on 26 May 2006. In 2011, Ellis said he would not consider returning to the show.

When Oliver first appears, he is knocked over by Dot Branning (June Brown) and is locked out of his house naked. Mo Harris (Laila Morse) picks the lock for him, but as his towel is caught in the door, he then has just his hands to cover himself. Cousins gives Honey Edwards (Emma Barton) advice about her unborn baby, finds Ben Mitchell (Charlie Jones) when he runs away, and talks to Little Mo Mitchell (Kacey Ainsworth) about her baby Freddie (Alex Kilby and Tom Kilby), thinking that she is suffering from stress. He then develops romantic feelings for Little Mo.

Oliver goes on a date with Little Mo, where she confides in him that she sometimes struggles with Freddie. He walks her home that night and they share a kiss on the doorstep. Little Mo later confides in Oliver that she has nearly hit Freddie in the past when he has been crying. When Freddie is injured, Oliver tells his colleague, Briony Campbell (Rae Hendrie), what Little Mo has told him. Briony tells Social Services, who suspect Little Mo has caused Freddie's injuries. However, Little Mo suspects 10-year-old Ben has caused them. Little Mo discovers that Oliver has betrayed her and ends their relationship. Oliver is offered a job in Leeds and decides to leave Walford. At the same time, Ben tells Oliver that he has hit Freddie on purpose, confirming Little Mo's suspicion, but Ben's father Phil (Steve McFadden) tells Oliver to keep quiet. Oliver takes Little Mo for dinner and tries to convince her to go to the police and clear her name but she refuses. They go to The Queen Victoria public house together and Peggy Mitchell (Barbara Windsor) calls Little Mo a child beater. Oliver stands up for her and is about to tell everyone the truth about Freddie's injury. Little Mo is angry with Oliver for not respecting her decision and she storms out of the pub.

Oliver gets drunk the following day and barmaid Dawn Swann (Kara Tointon) has to help him get into his flat at the end of the night. Little Mo's cousin Stacey Slater (Lacey Turner) sees this but doesn't tell her. Oliver finally admits to Little Mo that he loves her and proposes to her on 25 May 2006. Happy with the outcome, the two prepare to leave Walford for Leeds, but Oliver first apologises to Dawn for throwing her out of his flat the day he got drunk. She gives him a friendly kiss but Stacey also sees this and tells Little Mo who then confronts Oliver and pushes him to the ground; in response, he ends their relationship. As Little Mo prepares to leave for Barnstaple, Oliver realises that he still loves her and decides to ask her to go with him to Leeds. He runs to the tube station and tries to convince her to join him. Little Mo chooses not to go with him, and she leaves with Freddie. Oliver leaves Walford for Leeds on the same day. Provided by Wikipedia