The Innocency of Life - S4.E5

Kavanagh is asked to defend a Reverend accused of sexual harassment by a recently widowed parishioner. When Kavanagh begins to make inquiries regarding the death of the victim's husband, she mysteriously withdraws her complaint against the Reverend and the case collapses. Later Kavanagh discovers that she has become engaged to the vicar and finds himself defending her against charges that she murdered her husband.