Builders: David Attenborough descends beneath the waves and meets some of the tiny coral animals that helped build the Reef and make it an underwater wonderland. (1 of 3)
Builders: David Attenborough descends beneath the waves and meets some of the tiny coral animals that helped build the Reef and make it an underwater wonderland. (1 of 3)
Visitors: Mark Sir David Attenborough's 100th birthday as he explores the Great Barrier Reef, and discovers the animals that visit every year. (2 of 3)
Survival: In this concluding episode, Sir David Attenborough tries to understand what the next few decades may hold in store for the Reef. (3 of 3)