Avontuur Classics #1828

In "De oceaan depressie!", Captain Jim Sanders races against time as plummeting sea levels reveal a hidden alien operation beneath the ocean floor. When a bathyscaph vanishes during a deep-sea mission, Sanders must uncover the truth behind the mysterious disappearance—only to find the aliens are harvesting Earth’s elements, holding the crew captive for study. With the planet’s balance at stake, Sanders must outwit the invaders before the ocean’s secrets are lost forever.

In "De geleide komeet," Dr. Clarkson finds himself caught in a cosmic crisis when a guided comet, wielded by the mysterious Nuro, threatens Earth. As Solar races to divert the celestial menace, the strain of the effort leaves him weakened—yet he fights back with ingenuity, harnessing a broken satellite to recharge within the Van Allen Belt. The fate of the planet hangs in the balance as Solar pushes his limits to stop the comet and return to safety.