, the initial plan changes when astronaut Alan Shepard develops an ear infection and Jim Lovell is asked to go in his place on Apollo 13, together with Fred Haise and Ken Mattingly. The three astronauts get inside the module simulator and they go over the procedures that will take place in both the lunar module, Aquarius, and the command module, Odyssey, for the moon landing. Jeffrey wants his father to bring back a Moon rock for him, and Jim promises to try.