Source: CBBC
16. Tunnel
18-01-2019
CBBC
All episodes
15. Treasure Of The Islanders
17-01-2019
14. The Junior Nektons
16-01-2019
13. The Abyss Stares Back
15-01-2019
12. The Phantom Sub
14-01-2019
11. Monster Hunter
11-01-2019
10. Colossal Squid
10-01-2019
9. Fossil
09-01-2019
8. The Test
08-01-2019
7. Captured
06-12-2018
4. Digging Deeper
03-12-2018
Series 2: 4. Treaturous Waters
13-11-2018
Series 2: 12. Thunder And Lightening
23-11-2018
3. A.i.m.y.
30-11-2018
Series 2: 3. Mermaids
12-11-2018
6. Lonesome Jim
05-12-2018
25. Loki's Castle
06-11-2018
Series 2: 2. The Baltic Sea Anomaly
09-11-2018
Series 2: 13. The Gates
26-11-2018
