To bring you up to date from prior episodes, Claire (Jenny) and Sawyer (Rob) are "lost" on the mysterious Island (Hawaii) due to a very demanding “work” assignment.Tate was rather unhappy to learn he would be staying at Mia and BG's place while his parents “slaved” away on the island.
His first few days were spent making desperate attempts to contact his parents.
(Mia and BG later discovered several voice mail messages on their cell phones as result of his having hit the recall button. No telling who else he called)
Luckily another member of the Oceanic 6 (Nan) arrived to help entertain him.
Here he is seen coming out of his tunnel to welcome Nan to his lair.
The other end of the tunnel was the "hatch" where he was joined by Nan and Eddie
After a while, life off the island became a daily routine of:
Eating
Bathing
And combing the hair
But Tate did take his turn standing guard to protect the family from the "Others":
He waited patiently in case the evil Horatio made an appearance. Big Guy crafted a weapon (a wrapping paper tube) for just such an event.
In preparation for his parent's eventual return, Big Guy worked with Tate on a greeting for them when they got off the airplane. (You may need to turn the sound up on the video below to hear how well he learned).
Unfortunately he ended up resorting to "Da Da"!
Which brings this episode to an end with the reunion.