After You've Gone - Season 1 Episode 3 Lock Back In Anger

After Jimmy's van and all its contents including his tools and his jacket with his keys in the pocket gets stolen, Diana insists they change all the locks. This leads to a stand off between Jimmy's laissez faire attitude and Diana's belief in the heat of battle about whose house this is, Diana reminds Jimmy that since she and her husband gave Ann the deposit on for the house, the place is partly hers.