Self-confessed shopaholic Paul collects Star Trek memorabilia in the belief that it will one day be his children's inheritance, but partner Elaine fears their two-bedroom Surrey home is turning into a death trap with all the clutter, so estate agent Penny is sent to restore order. Plus, OCD sufferer Hayley heads to Plumstead, south London, to help library assistant Shereen, who last cleaned her flat a year ago.