Season 2

Season 2 of The Big Bang Theory returned to television in September 22, 2008, and contained 20 episodes.

Season 2: 2008-2009
'''Episode Name (original air date)
 * 1) The Bad Fish Paradigm  (September 22, 2008)
 * 2) The Codpiece Topology (September 29, 2008)
 * 3) The Barbarian Sublimation (October 6, 2008)
 * 4) The Griffin Equivalency (October 13, 2008)
 * 5) The Euclid Alternative (October 20, 2008)
 * 6) The Cooper-Nowitzki Theorem (Nveomber 3, 2008)
 * 7) The Panty Piñata Polarization (November 10, 2008)
 * 8) The The Lizard-Spock Expansion (November 17, 2008)
 * 9) The White Asparagus Triangulation (November 24, 2008)
 * 10) The Vartabedian Conundrum (December 8, 2008)
 * 11) The Bath Item Gift Hypothesis (December 15, 2008)
 * 12) The Killer Robot Instability (January 12, 2009)
 * 13) The Friendship Algorithm (January 19, 2009)
 * 14) The Financial Permeability (February 2, 2009)
 * 15) The Maternal Capacitance (February 9, 2009)
 * 16) The Cushion Saturation (March 2, 2009)
 * 17) The Terminator Decoupling (March 9, 2009)
 * 18) The Work Song Nanocluster (March 16, 2009)
 * 19) The Dead Hooker Juxtaposition (March 30, 2009)
 * 20) The Hofstadter Isotope (April 13, 2009)