Doctor Who

"A sonic wrench? Good morning, guv'nor! I'm the Doctor! Phew!"

- Chester P. Runk

Doctor Who, also known as simply The Doctor is a staple fictional character on Earth-1.

Overview
Doctor Who is a sci-fi character who is able to change into another person, of which there are were at least seven one of which was a woman. The Doctor used sonic instrument of some kind.

At some point Joe West became aware of Doctor Who and, possibly, a fan.

Joanie mentioned that Cecile Horton became pregnant again "seven Doctor Whos" later and when Joe West asked her about whether she was a fan, she answered that became one since the Doctor became a lady.

When Chester P. Runk encountered one of Cisco Ramon's inventions, it reminded him of a a "sonic wrench" and he briefly made an impression of "The Doctor".

Behind the scenes

 * In real life Doctor Who commonly referred to as The Doctor is indeed a staple pop culture character from the eponymous British TV series.
 * Joanie's mention is correct: considering she was born in 1998, Cecile became pregnant with her sibling seven Doctors later, as from 1996 there were technically seven incarnations of the character, including one inserted retroactively right after Eighth Doctor, who was concurrent with Joanie's birth first appearing in 1996.
 * The Doctor is indeed often seen using a sonic instrument, albeit usually not a wrench, but a screwdriver. However, sonic wrench was once mentioned in an audio play spin-off, which is canon to main TV continuity. It is unknown whether mention just spoofed the sonic screwdriver and resulted into something already invented or writers Thomas Pound and Jeff Hersh specifically referenced the audio play.