I love the thought that after containing the taumeoba spread on his ship and realizing that Rocky has the same problem only worse, Grace calculates his possible trajectory to rocky, washes up, sits down and thinks. He can go home or he can die. He can save earth and doom his best friend and his best friend's planet, or he can maybe save earth (he can't be sure that the beetles work) and definitely save rocky and his planet.
And you know what? I want him to not realize it, but he makes that decision in less than three hours.
