The Danza: Martin Clunes as Dr Martin Ellingham. Further variant in that the character's surname is an anagram of series creator Dominic Minghella.
Hey, It's That Guy!: Suffered from this at first due to Martin Clunes being well known for playing Gary on Men Behaving Badly, but this has decreased over time as he has become equally famous for this role.
McLeaned: Aunt Joan was killed off after Stephanie Cole chose not to return for Series 5. The character was a fixture in the setting and Martin's life, so killing her off was probably the most plausible explanation for her sudden disappearance.