They Lurk Beneath is the thirteenth episode of the first season of the animated series, Martin Mystery. It was originally released on January 28, 2004.
An archaeologist, Professor Melanie Samson who is digging for ancient Peruvian relics accidentally opens a portal to an underworld – unleashing an ancient civilization of aliens who have been living in the Earth’s core.
Back at Torrington Academy, Java is amusing the students by cutting the grass by hand. He's been given a new high tech lawnmower but it seems that the caveman's still freaked out by technology (a running gag). Martin vows to rid him of his phobia and Diana foresees trouble. After making Java wreck both the lawnmower and his pager, Martin realizes the Center is calling them and it's off there through a door that's just appeared in a nearby wall.
- Professor Melanie Samson
- Slime Scan
- Bio Scan
- Alpha Goggles
- Turbo Bungee