What's Wrong With Ruth?

Could Doc Martin’s forgetful aunt possibly have dementia?

- Emma Bullimore, Caren Clark

Aunt Ruth’s mind is normally razor-sharp, so it’s a shock this week when the usually perky pensioner finds herself struggling to remember the simplest things. She even calls PC Penhale out to the house, only to find that her suspected overnight burglary was actually a case of her accidentally leaving her door open before she went to bed.