Source: CBBC
16. Tunnel
18-07-2018
CBBC
All episodes
22. Strange Migration
17-07-2018
15. Treasure Of The Islanders
21. Bad Luck Fish
16-07-2018
14. The Junior Nektons
20. The Sirens Song
13-07-2018
13. The Abyss Stares Back
19. The Proteus Factor
12-07-2018
12. The Phantom Sub
18. Field Of Giants
11-07-2018
Series 2: 13. The Gates
26-06-2018
Series 2: 3. Mermaids
12-06-2018
4. Digging Deeper
02-07-2018
1. Here Be Dragons
27-06-2018
Series 2: 4. Treaturous Waters
13-06-2018
Series 2: 12. Thunder And Lightening
25-06-2018
3. A.i.m.y.
29-06-2018
6. Lonesome Jim
04-07-2018
