#3671 : Season 15 Episode 159
CBS int(0)
Aired: October 31st, 2001 @ 1:30 PM EST on CBS
When Massimo rushes Ridge to the hospital after his fall, Eric, Stephanie and Taylor soon arrive. When Ridge needs blood and Eric isn't a match Stephanie offers to donate since she is type O, and is shocked to learn that neither her blood type nor Eric's is compatible with Ridge's, meaning that Ridge isn't Eric's son!