| Season Episode: 3x01 |
| Episode: 38 |
| Production Number: 301 |
| Original Air Date: 2006-03-06 |
| Title: Atkins Diet |
|  |
| Season Episode: 3x02 |
| Episode: 25 |
| Production Number: 302 |
| Original Air Date: 2006-03-20 |
| Title: Death of the Sun |
| |
| Season Episode: 3x03 |
| Episode: 26 |
| Production Number: 303 |
| Original Air Date: 2006-03-29 |
| Title: Big Freeze |
| |
| Season Episode: 3x04 |
| Episode: 27 |
| Production Number: 304 |
| Original Air Date: 2006-04-26 |
| Title: Roman Tech |
| |
| Season Episode: 3x05 |
| Episode: 28 |
| Production Number: 305 |
| Original Air Date: 2006-05-24 |
| Title: Lightining |
| |
| Season Episode: 3x06 |
| Episode: 29 |
| Production Number: 306 |
| Original Air Date: 2006-06-28 |
| Title: The Deep |
| |
| Season Episode: 3x07 |
| Episode: 30 |
| Production Number: 307 |
| Original Air Date: 2006-07-05 |
| Title: Explosive Force |
| |
| Season Episode: 3x08 |
| Episode: 31 |
| Production Number: 308 |
| Original Air Date: 2006-07-12 |
| Title: Pyramids |
| |
| Season Episode: 3x09 |
| Episode: 32 |
| Production Number: 309 |
| Original Air Date: 2006-07-19 |
| Title: Colliding Contients |
| |
| Season Episode: 3x10 |
| Episode: 37 |
| Production Number: 310 |
| Original Air Date: 2006-07-26 |
| Title: Volcano Alert |
| |
| Season Episode: 3x11 |
| Episode: 33 |
| Production Number: 311 |
| Original Air Date: 2006-09-06 |
| Title: Birth of the Universe |
| |
| Season Episode: 3x12 |
| Episode: 34 |
| Production Number: 312 |
| Original Air Date: 2006-09-20 |
| Title: Freeze Me |
| |
| Season Episode: 3x13 |
| Episode: 35 |
| Production Number: 313 |
| Original Air Date: 2006-10-12 |
| Title: Forensics Under Fire |
| |
| Season Episode: 3x14 |
| Episode: 36 |
| Production Number: 314 |
| Original Air Date: 2006-11-02 |
| Title: Extinctions |
| |
| Season Episode: 3x15 |
| Episode: 39 |
| Production Number: 315 |
| Original Air Date: 2006-12-06 |
| Title: Deadliest Planets |
| |
| Season Episode: 3x16 |
| Episode: 40 |
| Production Number: 316 |
| Original Air Date: 2006-12-07 |
| Title: Was Darwin Wrong? |
| |
| Season Episode: 3x17 |
| Episode: 40 |
| Production Number: 317 |
| Original Air Date: 2007-01-31 |
| Title: Polar Apocalypse |
| |
| Season Episode: 3x18 |
| Episode: 41 |
| Production Number: 318 |
| Original Air Date: 2007-02-21 |
| Title: Amazing Planet |
| |
| Season Episode: 3x19 |
| Episode: 42 |
| Production Number: 319 |
| Original Air Date: 2007-02-28 |
| Title: Stone Age Apocalypse |
| |
| Season Episode: 3x20 |
| Episode: 43 |
| Production Number: 320 |
| Original Air Date: 2007-03-07 |
| Title: Comets |
| |
| Season Episode: 3x21 |
| Episode: 44 |
| Production Number: 321 |
| Original Air Date: 2007-03-14 |
| Title: Prehistoric Americans |
| |
| Season Episode: 3x22 |
| Episode: 45 |
| Production Number: 322 |
| Original Air Date: 2007-03-28 |
| Title: Deep Space Probes |
| |
| Season Episode: 3x23 |
| Episode: 46 |
| Production Number: 323 |
| Original Air Date: 2007-04-12 |
| Title: Dino Meteor |
| |
| Season Episode: 3x24 |
| Episode: 47 |
| Production Number: 324 |
| Original Air Date: 2007-04-21 |
| Title: Planet Storm |
| |
| Season Episode: 3x25 |
| Episode: 48 |
| Production Number: 325 |
| Original Air Date: 2007-04-28 |
| Title: Killer Lakes |
| |
