[Isaak comes by simply because he really doesn't have anything else to do. He's not a former inmate, but this is hardly his first time 'round the multidimensional carousel. So, still wearing that ever-fashionable orange, he's wandering about the dome, getting his bearings.
If he's stuck, again, in some between-worlds drain trap... he is going to be very put out, but experience suggests he has a day or two at least before that question is definitively answered. In the mean time he'll try to wait it out, and hope it isn't long before he's returned to his ship.
A meal is a good enough place to start, but hopefully there's something other than slug on the menu.]