Episode 13 - Lessons Learned

Adrift at sea, having narowly escaped being blown up, John faced the dilema to remain floating in the sea and watch the sphere be dragged away from him,or swim like mad to get back to the sphere and stand the chance of yet again being dragged into the vortex and through the tunnel to somewhere else. He decides on the latter course, but does he make it back to the sphere in time? Is he dragged back through the vortex to face the same nightmare again?