Family Guy - 8x2 - Family Goy

When Lois finds a lump on her breast, she goes to the doctor to test for cancer.
The tests come back benign, but the doctor looks at her family medical history and reveals some news about Lois' heritage.
Peter takes to the family's new found faith eagerly, but when he is visited by the ghost of his father, he changes his tune.
After a visit from an old friend sets him straight, Peter and Lois agree to go back to the way things were