There are capsules attached to the ISS in case of emergency. If an astronaut gets sick, they can be back to earth in Very little time. Nothing to worry about. They just have a little free time right now. One astronaut even plays guitar to pass the time.
-
They have to beg the Russians to let them come back down. If they're in a good mood and the price is right, the Russians will acquiesce
-
They will return to earth in Russian Soyuz capsules.
-
return on a russian shuttle.
-
They have a couple of Russian Soyuz capsules up there at all times, just in case they have to evacuate in an emergency.
-
The ISS has escape capsules to return to Earth.