All episodes
#
Title
401
Butterflies + Conservation
402
Comedy + Science
403
Strangers + Social Anxiety
404
Sperm Competition
405
Immigration + Anthropology
406
Cheating + Dishonesty
407
Marketing + Consumerism
408
Memory
409
Emotion + Expression
410
Brain Scan + Joke Writing
411
Gift Giving
412
Gender + Attraction