Fringe: Season 1, Episode 2

1 - 2: The Same Old Story

Olivia, along with Peter and Walter Bishop, reopens a cold case involving a serial killer (Derek Cecil) who extracted the pituitary glands from his victims after investigating the strange death of a woman (Betty Gilpin) who had an even stranger child. The woman was pregnant for a few minutes, yet the baby she birthed was fully developed - then aged eighty years in the span of another few minutes. They discover that the killer is an artificially-aged human, who is using the enzymes extracted from the removed glands to halt his accelerated aging disease. The team is able to track him and his creator (Mark Blum) down, causing the man to die from being deprived of the enzymes keeping him young.