The former teen heartthrob is revisiting a formative role in “Freakier Friday,” but a lot has changed in 22 years, on- and offscreen.

The former teen heartthrob is revisiting a formative role in “Freakier Friday,” but a lot has changed in 22 years, on- and offscreen.
With an emphasis on younger viewers, he established the networks as serious rivals to ABC, CBS and NBC, which had ruled television for nearly 40 years.