It is reported that This Is Spinal Tap star Michael McKean has joined the cast of the new Breaking Bad spin-off, Better Call Saul.

Deadline.com, which broke the story, says that McKean will play Dr Thurber, "a brilliant attorney who is now restricted by an unusual affliction".

The series follows the pre-Walter White shenanigans of lawyer Saul Goodman (Bob Odenkirk).

Better Call Saul is set to debut on AMC in the US in November.