Ross, 38, first appeared as Denise Wicks's (Diane Parish) alcoholic ex-husband Owen in June 2006 when he arrived in Walford to make contact with his daughter Libby (Belinda Owusu).
During his stay, he rekindled his romance with Denise, but his violent behaviour soon reared its head when he hit her and subsequently held her hostage in her own flat. The police arrested him and he was remanded in custody pending trial.
In September 2006, Owen's mother Liz (Williams) visited her son in prison prior to his court appearance, in which he received a six-month custodial sentence, suspended for two years.
Following his release, Liz urged her son to start a new life in Wales but at a low ebb, Owen knocked his mother unconscious and kidnapped his daughter Libby, drugged her and drove them to Epping Forest in a stolen car.
On hearing that Owen planned to end his and Libby's lives, Denise and Kevin (Phil Daniels) rushed to their location. In Owen's attempt to drown Libby, she fell unconscious before he bolted into the stream himself. Both he and Libby survived the incident and the mentally unstable father was imprisoned for three years.
With Owen claiming that he is a changed man and Liz more than keen to see her granddaughter again, the pair begin planning their comeback. Their reappearance, however, will turn prospective Oxford University student Libby and her mother Denise's worlds on their heads.
Speaking of their return, executive producer Diederick Santer said: "It's very exciting to have Kate and Lee back in the show. Lee's one of the finest actors of his generation, and the scenes he did with Belinda Owusu and Diane Parish three years ago were electrifying. I'm looking forward to more!"
He added: "Kate's brief appearances were equally memorable - she's a brilliant comic and dramatic actress, and I'm keen to find out more about the unusual Liz Turner."
Ross and Williams have already returned to filming at Elstree Studios, home of EastEnders, and will reappear on screen in late Summer.
Since his last appearance, Ross has guest starred in dramas such as Robin Hood and Moses Jones.
> Click here to look back at Owen Turner's 2006 EastEnders storyline in Soap Scoop