Possibly the least of the sequels. There's strong design work for the ruined city, but the construction of the script is very patchy, built around Heston's limited return and marking time until descending beneath the city. Why do the mutants wear human masks (is that tied to the "From now on we will be beautiful" line in Battle?). Heston cements his character's rep as a tosser by blowing the world up. A bit churlish of him, I feel.