And as is common knowledge, the BBC execs didn't want McCoy either as his acting ability was questionable. JNT was asked to re-cast.... JNT did, bringing in McCoy + a dozen other delibiratly poor actors.... The Execs just gave up, and agreed McCoy be cast, even though JNT stitched it up
Could never really work out JNT, as his reign was during the show's long decline, and I know Tom Baker didn't like him. However, he did last for almost ten years on the show and made it into a big export for the BBC.