14. Inconceivable

The robbery of fertilized embryos from a sperm bank call for Benson and Stabler to track down the thief. Clues from the clinic's security tape lead them to a long list of suspects including two publicity-hungry extremists. The detectives race against the clock to find the missing embryos, but that isn't the only clock that's ticking - Olivia considers her own fertility and the possibility of motherhood.