The DEO tests Supergirl's abilities in the middle of the desert.
Hellgrammite kills a guard at a chemical plant and then Supergirl and the DEO are called in to investigate.
Kara attempts to save a ship from a fire at the port but accidentally causes an oil spill.
Kara arranges to meet both James and Winn behind the building as Supergirl.
Two soldiers sent by Astra attack Hellgrammite for his indiscretion at the chemical plant.
The truck carrying the DDT is attacked by Hellgrammite while being protected by Alex and Hank.