Season 1
S1.E1 ∙ Natural SelectionS1.E2 ∙ InstinctS1.E3 ∙ Variation Under NatureS1.E4 ∙ Effects of External ConditionsS1.E5 ∙ Conditions of ExistenceS1.E6 ∙ Variations Under DomesticationS1.E7 ∙ Parts Developed in an Unusual MannerS1.E8 ∙ Entangled BankS1.E9 ∙ Unconscious SelectionS1.E10 ∙ Endless Forms Most Beautiful
Season 2
S2.E1 ∙ Nature Under Constraint and VexedS2.E2 ∙ Governed by Sound Reason and True ReligionS2.E3 ∙ Mingling Its Own Nature with ItS2.E4 ∙ Governed as It Were by ChanceS2.E5 ∙ Ipsa Scientia Potestas EstS2.E6 ∙ To Hound Nature in Her WanderingsS2.E7 ∙ Knowledge of Causes, and Secret Motion of ThingsS2.E8 ∙ Variable and Full of PerturbationS2.E9 ∙ Things Which Have Never Yet Been DoneS2.E10 ∙ By Means Which Have Never Yet Been Tried
Season 3
S3.E1 ∙ The Weight of This CombinationS3.E2 ∙ Transitory Sacrifices of CrisisS3.E3 ∙ Formalized, Complex, and CostlyS3.E4 ∙ Newer Elements of Our DefenseS3.E5 ∙ Scarred by Many Past FrustrationsS3.E6 ∙ Certain Agony of the BattlefieldS3.E7 ∙ Community of Dreadful Fear and HateS3.E8 ∙ Ruthless in Purpose, and Insidious in MethodS3.E9 ∙ Insolvent Phantom of TomorrowS3.E10 ∙ History Yet to Be Written
Season 4
S4.E1 ∙ The Collapse of NatureS4.E2 ∙ Transgressive Border CrossingS4.E3 ∙ The Stigmata of ProgressS4.E4 ∙ From Instinct to Rational ControlS4.E5 ∙ Human Raw MaterialS4.E6 ∙ The Scandal of AltruismS4.E7 ∙ The Antisocialism of SexS4.E8 ∙ The Redesign of Natural ObjectsS4.E9 ∙ The Mitigation of CompetitionS4.E10 ∙ From Dancing Mice to Psychopaths
Season 5