Source: CBBC
18. Field Of Giants
09-04-2021
CBBC
All episodes
17. The Sunken Gallery
16. Tunnel
08-04-2021
15. Treasure Of The Islanders
14. The Junior Nektons
07-04-2021
13. The Abyss Stares Back
12. The Phantom Sub
06-04-2021
11. Monster Hunter
10. Colossal Squid
05-04-2021
9. Fossil
Series 2: 1. From The Stars
11-03-2021
21. Bad Luck Fish
08-03-2021
Series 2: 8. Hidden Secrets
16-03-2021
Series 2: 11. The Missing
18-03-2021
