Sixth Doctor

Nitcentral's Bulletin Brash Reflections: Doctor Who: Novels: Sixth Doctor
'Once again - yet again - Peri felt that edgy mix of disappointment and annoyance. Once again, on some deep emotional level, she had expected to turn and see the friendly and engaging, utterly decent and trustworthy man she had once known - only to find that it was, well, him.'

Colin Baker stumbles round a few books just-about managing to avoid acid baths. Though I think he beats someone to death with the TARDIS hat-stand at one point.