Sam stays in Walford despite Ava and Dexter telling him to leave.Ava slowly realises she still has romantic feelings for Sam and they reunite.Dexter's father, Sam James (Cornell S John), arrives unexpectedly and initially hides his true identity from Dexter, who takes a liking to him.
Ava and Dexter give Bianca advice, but after the gang are arrested and released on bail, they trash Ava and Dexter's home. Ava decides to move to Walford and rents a flat on the Square.
Dexter is the grandson of Cora Cross (Ann Mitchell) and son of her illegitimate daughter, Ava Hartman (Clare Perkins).
Dexter's storylines include his friendships with Jay Brown (Jamie Borthwick) and Lola Pearce (Danielle Harold), his job as a mechanic with Phil Mitchell (Steve Mc Fadden), and his struggle to accept his estranged father, Sam James (Cornell S John) only to learn that Sam initially tracked him down hoping he would donate a kidney and a tense relationship with the Carter family.
Dexter is initially hostile to this, but he slowly warms to his father. Dexter decides to take a test to see if he is a match, but Ava refuses to let him.
Dexter meets his cousin, Abi Branning (Lorna Fitzgerald), Later, Ava's car breaks down in Walford on her way to a job interview, so Dexter takes it to the local garage where he becomes friends with Abi's boyfriend, Jay Brown (Jamie Borthwick), and Phil Mitchell (Steve Mc Fadden) offers him work so he can pay for the repairs.
Dexter becomes friends with Lola Pearce (Danielle Harold) and is shocked to discover that she is a mother.