Season 4

# Episode Original Air Date
401 The Robotic Manipulation September 23, 2010
402 The Cruciferous Vegetable Amplification September 30, 2010
403 The Zazzy Substitution October 7, 2010
404 The Hot Troll Deviation October 14, 2010
405 The Desperation Emanation October 21, 2010
406 The Irish Pub Formulation October 28, 2010
407 The Apology Insufficiency November 4, 2010
408 The 21-Second Excitation November 11, 2010
409 The Boyfriend Complexity November 18, 2010
410 The Alien Parasite Hypothesis December 9, 2010
411 The Justice League Recombination December 16, 2010
412 The Bus Pants Utilization January 6, 2011
413 The Love Car Displacement January 20, 2011
414 The Thespian Catalyst February 3, 2011
415 The Benefactor Factor February 10, 2011
416 The Cohabitation Formulation February 17, 2011
417 The Toast Derivation February 24, 2011
418 The Prestidigitation Approximation March 10, 2011
419 The Zarnecki Incursion March 31, 2011
420 The Herb Garden Germination April 7, 2011
421 The Agreement Dissection April 28, 2011
422 The Wildebeest Implementation May 5, 2011
423 The Engagement Reaction May 12, 2011
424 The Roommate Transmogrification May 19, 2011