Mary and Dad try to survive on a seemingly deserted island after they wash up on a nearby reef. Could anyone else have survived? Where will they go? What will they do? And how did they wind up here in the first place?
In the last episode, Mary and Dad didn't quite find the epic cave experience they were looking for. Do they strike out again or hit pay dirt? Also, Mac gives fishing a try.
Dad gets desperate to leave the cave complex Mary and Dad now refer to as The Shaft. Being underground takes its toll. Does this mean R.I.P. for D.A.D.?
While Dad is combing the beach and searching for signs of possible rescue, he stumbles across a mystery of startling proportions: a message from the outside world.
