Flash, Dale and Zarkov are captured by Desira's men; basically armed guards in purple berets who ride horned beasts called gryphs. But Brasnor pulls a fast one, and stands idly by while a "tree dragon" attacks his queen. Flash saves Desira, and then Brasnor reveals his hand, taking everyone captive and imprisoning them in his mountain fortress.
To escape the ants, Flash and his buddies jump into a river, but soon find themselves being pulled into a tunnel, as if by a magnet. "But where is it taking us?" queries a worried Dale Arden.
We won't find out till next week, but this episode nicely captures the breathless, cliffhanger quality of the 1930s Flash Gordon productions starring Buster Crabbe.