WHAT IS RETURN TO EARTH?

The 4 best NASA astronauts have just completed their expedition on the planet Mars after spending 5 months there. However, it seems that the spacecraftthey arrived in has suffered severe damage, and several components of the ship are missing. Only the best astronaut will be able to obtain all the necessary components, repair the spacecraft, and return home. Who among the 4 brilliant astronauts will be able to repair the ship before the others and make it back home?

STORY

Commander astronaut - "Expedition completed on Mars, sir."

                                                     "We have nothing left to do here, over."

Commanding general - "Received, Commander. Return home immediately, over."

Commander astronaut - "Received."

Commander astronaut - "General, we have a problem. The spacecraft has suffered various damages after all this time on Mars. It will take some time to repair, and the real issue is that, with all the damages sustained, only one of us 4 can fit in the spacecraft. So only 1 can return. Requesting assistance, over."

Commanding general - "Commander, I regret to inform you that we can't do anything from here. You'll have to figure it out on your own."

                                                  "The only help will arrive in at least 3 months, over."

Commander astronaut - "We don't have 3 months..."