Portal 2 - Lab Rat Full Comic
This is the comic released by Valve that fills the gap between Portal and Portal 2. (Video form of the comic.)
1st Comic Release Date: 4/8/2011.
Part 1: 0:00 - 1:30.
2nd Comic Release Date: 4/11/2011.
Part 2: 1:30 - 2:43.
Comic Link: http://www.thinkwithportals.com/comic/#1