While Sheldon was trying to explain the problem of transportation to Leonard, Dr. Gablehouser came and introduced them Dennis Kim, who is a highly sought-after doctoral candidate.
Sheldon firstly didn't take Dennis seriously because he thought he was better than Dennis because he started graduate work at 14 which was one year earlier than Dennis.
But soon enough Sheldon felt threatened when Dennis told him the reason why he didn't make it at 14 is because he was busy tunneling out of North Korea.
And even worse is that Dennis criticized that Sheldon's string theory research was nothing but an dead end. Then the war officially claimed to begin from that on.
sought-after: very rare and of very good quality
tunnel: a long passage usually made under the ground to connect to somewhere.
grid: a pattern of straight lines that across each other to form squares.
doctoral: paper or work written or done to obtain doctor degree.
string: made by thin ropes twisted together to tie things.
theory: set of ideas about something you have by your own opinion.
research: a study about something
facility: building, equipment or service provided for a particular purpose.
