Dizi Adı: Malcolm in the Middle
Bölüm Adı: Lois's Sister
Sezon/Bölüm: 5. Sezon 13. Bölüm
Yayın Tarihi: 22 Şub. 2004

Lois’ younger sister, Susan, pays the family a visit and brings with her expensive gifts for the boys, biting remarks for Lois and a cold shoulder for Hal – whom she has never forgiven for dumping her for Lois. Lois and Susan’s competitive relationship takes a turn for the worse when Susan gives Malcolm and Reese her prize ’65 Mustang convertible. But when Lois discovers that Susan needs a kidney transplant, she puts her anger aside and offers to donate her kidney to Susan, which Susan only sees as the perfect opportunity for Lois to one-up her.