Undercovers Season 1 Episode 5 (Undercovers s01e05) with title “Not Without My Daughter” aired on Wednesday, October 20th 2010 at 08:00 pm via NBC Network.
Here is summary for Undercovers Season 1 Episode 5 :

Their mission is easy: Steven and Samantha are to find Shin Won, a North Korean physicist responsible for inventing a device that can change an object’s state of matter, and facilitate his defection. Even easier, Shin Won is attending the Particle Physics Symposium in Geneva, Switzerland, where Steven and Samantha go undercover to locate the scientist and bring him to the U.S. Things aren’t so simple when Shin Won refuses to leave unless they get his daughter out of North Korea.