Complex sentence: When Margot's brother Mason removes her womb, thus aborting the child, an enraged Graham (having only just found out about the pregnancy) attacks him; in the following episode, Graham does nothing to stop Lecter from mutilating Mason.
Split into simpler sentences: When Margot's brother Mason removes her womb, thus aborting the child, an enraged Graham (having only just found out about the pregnancy) attacks him. In the following episode, Graham does nothing to stop Lecter from mutilating Mason.