| ID | Interpret | Skladba | Album | |
| 121. | DonJuan Fontaine | Theory In Development | Microphone Matrimony |  |
| 122. | Dr Kuch | The Big Bang Theory | Analog Disease | |
| 123. | Dr Kuch | The Big Bang Theory | Analog Disease | |
| 124. | Low Light Mixes | String Theory Vol. 2 | | |
| 125. | ~dj VeNom~ | STRING THEORY | mp3 | |
| 126. | Buffy the Vampire Slayer (Sou | I've Got A Theory, Bunnies, If We're Together | Once More, With Feeling - Ori | |
| 127. | Djinji Brown | Afro-Tek Theory | Afro Bionics | |
| 128. | Thom Donovan | Hole Theory | Reading at Unnameable Books, hosted by Brenda Iijima, January 24, 2009 | |
| 129. | Noso-Roh Prophecy | Spiral Theory | | |
| 130. | Isis | Theory/Practice | http://isis.arithmancy.net | |
| 131. | Dog Eat Dogma | Big Bang Theory | Dogmachine | |
| 132. | Dr Kuch | The Big Bang Theory | Analog Disease | |
| 133. | Alex Halavais | Game Theory | Intro Interactive | |
| 134. | DrMindbender | Chaos Theory | 02 01 06 | |
| 135. | DrMindbender | Chaos Theory | 02 01 06 | |
| 136. | Charles Darwin, M.A., F.R.S. | 06B: Difficulties of the Theory - Part 2 | The Origin of Species by Means of Natural Selection | |
| 137. | Barenaked Ladies | Big Bang Theory Theme | Big Bang Theory Theme |   |
| 138. | Barenaked Ladies | Big Bang Theory Theme | Big Bang Theory Theme | |
| 139. | Jay Mac | Low End Theory March 2007 | | |
| 140. | Charles Darwin, M.A., F.R.S. | 06B: Difficulties of the Theory - Part 2 | The Origin of Species by Means of Natural Selection | |
| 141. | Thomas DiLorenzo | The Theory of Political Entrepreneurship | Mises University 2005 | |
| 142. | Barenaked Ladies | Big Bang Theory Theme | IGIF Presents: Show Tunes | |
| 143. | WordTheCat | archbishop-spatial-theory | www.wordthecat.com | |
| 144. | Charles Darwin, M.A., F.R.S. | 06A: Difficulties of the Theory - Part 1 | The Origin of Species by Means of Natural Selection | |
| 145. | Theory of a Deadman | Theory of a Deadman - Not meant to be.mp3 | Scars & Souvenirs | |
| 146. | Systems Theory | Systems Theory Concentrate | | |
| 147. | Systems Theory | Systems Theory Concentrate | | |
| 148. | His Boy Elroy | String Theory Sample | Web Samples | |
| 149. | Paradise Camp 23 | Theory Megatron [excerpt] | oTo | |
| 150. | Professor Ian Stewart | Strings, symmetry and a theory of everything | A short history of symmetry | |
