Walt later needs to bring Jesse back into the business to make amends for Hank's assault, so he convinces Gus to fire Gale and re-hire Jesse.
When Walt arrives, Gale expresses admiration and eagerness to learn. By 2009, Gale has broken in the lab's equipment but has been waiting for Gus to hire Walt to cook blue meth. He analyzes the 'blue meth' samples Gus provides and assures Gus it is the best meth he has ever seen. Gale selects and installs the meth lab's production equipment. The construction of the underground meth lab, which Werner Ziegler oversees, is revealed to have been done in accordance with Gale's design. Gale asserts he could make better quality meth himself, but Gus says he has bigger plans for Gale.
In the early 2000s, Gale was a post-graduate student and researcher at the University of New Mexico, and discreetly tests meth samples Gus provides as part of a plan to end his need for Mexican cartel cocaine.
