Plot summary
A stranger appears in Mount Justice claiming to be the future grandson of Barry Allen. The boy, Bart Allen /Impulse, meets with the rest of the Flash family, but is interrupted when Neutron goes on a rampage. The Flash, Kid Flash, and Impulse defeat Neutron, and Impulse secretly administers a cure to remove his powers. Impulse comes from a post-apocalyptic future, and his one-way trip to the past does not seem to have changed it. Meanwhile, Red Arrow and Cheshire travel to a League of Shadows base in Tibet and find the original Roy Harper.
Credits
Adapted from Wikipedia contributors, List of Young Justice episodes. HTML formatting and reference markers removed.