1. Ways of Being Male

This episode focuses on the varied tactics that males use to win females & the chance to mate.

3. Race for the Egg

This episode reveals the sexual strategies that are used to ensure that the sperm reaches the egg.

4. The Parental Dilemma

This episode looks at the strategies the sexes use to ensure they're not the ones left holding the baby.

5. Family Affairs

This episode looks at sex & the role it plays within family groups & the violence & jealousy it causes.

6. The Riddle of Sex

Examines the reasons for sex,how some species have abolished it whilst for others it ensures survival.