Sci Fi Wire has details of who will be appearing in an upcoming episode of Angel.

Christian Kane, who plays evil lawyer Lindsey McDonald, told Sci Fi Wire that his return was carefully planned.

Series co-creator Joss Whedon 'had the idea of not putting my name on it, no credit, no nothing, and just bringing it in,' Kane said.

"It was really fun. I just went to London and talked to some of the great fans that we've got out there, and supposedly I hear, five minutes after the show aired, six message boards crashed or something. Anytime I can do that and cause havoc, that's just my style."

Kane, whose character left at the end of season two, said he was surprised to be asked back:

"I was in New York," he said. "I was doing a film with Queen Latifah, that I'm still doing, actually, called Taxi. And [Joss] called me up, and said, 'You know, we've got an idea for you to come back on the show. What do you think?' And without hesitation I was like, 'Absolutely.' Because I love working with him."