He dies soon thereafter , and when dealing with his effects , Donna learns that he unknowingly fathered another daughter .
Donna is shocked when her estranged father Derek ( Clarke Peters ) is admitted to the hospital and diagnosed with cancer .
Derek dies soon thereafter , and when dealing with Derek 's effects , Donna learns that he unknowingly fathered another daughter .
Donna is shocked when her estranged father Derek ( Clarke Peters ) is admitted to the hospital and diagnosed with cancer .