Air date: 1999-06-01

Runtime: 30 min

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

Air date: 1999-01-13

Runtime: 30 min

This episode looks at how females force males to prove their worth before being accepted as mates.

Air date: 1999-01-20

Runtime: 30 min

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

Air date: 1999-01-27

Runtime: 30 min

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

Air date: 1999-02-03

Runtime: 30 min

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

Air date: 1999-02-05

Runtime: 30 min

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