S04E13 - Harbinger Of Death

Is Leonard an astronomer genius or coffee spilling hack? Will Carrie ever stop relocating in an attempt to escape her inner turmoil? How do you please someone who only wants to talk about comets until he is asked to talk about comets? And does Aunt Edna even have bursitis? So get computering on that telescope and don't call Thor by his first name while we keep a lookout for a 'Harbinger of Death'.