In a new interview with The Telegraph, the actor contended that he acted honourably in bowing out of the role after his brief tenure as the Ninth Doctor.
"I know what went on and the people who were involved know what went on - that's good enough for me," Eccleston said, adding: "My conscience is completely clear."
The actor continued: "I've lived my life, particularly my working life, on the basis that I have to be able to look at myself in the mirror about the way I behave. It wasn't a bold move, it was an entirely natural one.
"I'm hugely grateful to the children who to this day come up and talk to me about the show."