Anna and Diana square off in the dark bowels of the Mothership - Diana has been down there for 15 years and not had a single glimpse of Anna. Meanwhile, Erica has Tyler's blood analyzed, and learns the V's did something sinister to her when she was pregnant with him. Written by
Did You Know?
The title is based upon a quote from William Shakespeare
's play "King Lear" (Act I, Scene IV): "How sharper than a serpent's tooth it is to have a thankless child!" See more
When Ryan receives an incoming transmission on the communicator the first time in this episode and in the next episode, he presses the button on it to answer. However, the second time Anna calls him in this episode, it answers automatically. See more