In this episode, Heather Kerr played a teenage version of Eunice.

With Connor's initial role in plot decided, they came up with the concept of a 'teenage' version for further appearances.

A teenage version of Alan is portrayed in flashback by Nico Mirallegro.

Several 1950s theatrical Disney shorts, however, were the first to present teenage versions of Donald's nephews.

His nemesis is a teenage version of Doomsday known as Doomsboy.

In his teenage version, he is shown to have many interests (obsessions for traps, martial arts, wrestling, and weight lifting).

They are like a teenage version of political art.

The Foster children use the teenage and adult version, with 120 milligrams of caffeine, even though it is labeled as not for use by children.

The teenage version has a rule: no one under 14 allowed.

The Doctor also sees Cortana as a teenage version of herself: smarter than her parents, always "talking, learning, and eager to share her knowledge."