 they say that when they detach from iss they're very confident they will be able to get back to earth and in fact uh during a news cycle there was talk about that russian uh satellite that broke up into 100 pieces and the astronauts had to get into the various capsules as lifeboats they did that with boeing starliner capsule they were quite prepared to use it as an emergency lifeboat so i don't think they're stuck up there