Jessie Christiansen and the Goldilocks retraction.

Surely You're Joking

Prof. Jessie Christiansen returns to give Mitch and Kevin heads up on the planet hunting Kepler Space Telescope's final mission update, on how discoveries sometimes have to be walked back a bit, and the "what's up with that?" on Oumuamua, the asteroid (or maybe space ship?) from outside the solar system. There is some singing involved.