Secret Beneath The Sea (1963)

In this follow-up series to City Beneath The Sea, Scientists Mark Bannerman (Gerald Flood) and Peter Blake (Stewart Guidotti) again find themselves in the lost underwater city of Aegira searching for rare metals vital for the future of space research. Also stars Peter Williams as Captain Payne.

Episodes included in this set are:
The Mysterious Metal
Voyage Into Danger
Sabotage
The X-Layer
Operation Grand Design
The Death Trap

Sold as a single DVD-R set.