10 Steps to Murder - Season 1 Episode 2 -

Lea Adri-Soejoko and Rahim Mohammadi were very different people, brought together by their shared love of gardening. Refugee Mohammadi's allotment was a mark of acceptance into British society. Which is why he would do anything to keep it - even kill his mentor, kindly 80-year-old allotment society secretary Lea.