| No | Episode Name | Episode Synopsis | Runtime |
| #1 | One Ocean | One Ocean takes us on a journey from the intense heat of the tropics to our planet’s frozen poles to reveal new worlds and extraordinary never-before-seen animal behaviours. | 60 mins |
| #2 | The Deep | The adventurers in submarine explore the ocean and film everything around them. | 60 mins |
| #3 | Coral Reefs | Corals build themselves homes of limestone in the warm, clear, shallow seas of the tropics. | 60 mins |
| #4 | Oceans of Wonder | This extended special takes you on a journey from the equator to the unexplored depths of the ocean, meeting all the best-loved characters from the series. | 60 mins |
- David Attenborough returns to the world’s oceans in this sequel to the acclaimed documentary filming rare and unusual creatures of the deep, as well as documenting the problems our oceans face.
- Year: 2018
- Genre: Wildlife
- Languages: English
- Cast: David Attenborough, Peter Drost, Roger Munns
- Director: BBC studios
