AllMovie

While burying the key to her adopted son Clark's spaceship in the cellar of her home, Martha Kent (Annette O'Toole) is exposed to kryptonite spores. Deathly ill, Martha is rushed to the hospital in a coma. Her husband, Jonathan (John Schneider), is later informed that Martha is pregnant -- meaning that her kryptonite-inspired illness may have devastating long-range complications. Meanwhile, Clark (Tom Welling) himself begins suffering the after-effects of kryptonite poisoning, requiring John to resort to desperate measures to save his family.