Jo Frost, who is best known for her role in Supernanny, has opened up about her life-threatening medical diagnosis.

After a short absence, Frost has retired the supernanny shtick and returns Tuesday night in an admirably resolute but occasionally difficult new TLC reality series called “Family S.O.S.

Watch Jo Frost's Return in the Exclusive Trailer for the Lifetime Series. Lifetime will debut 20 all-new episodes of the hit show next year. By. Eric Todisco. Eric Todisco.