She then segued to television; working as an assistant to executive producers on the Syfy reboot Flash Gordon.

Wu had previously written a pilot that was "a love letter" to Fuller titled Memory Bank, which he read and led to her hire.

Her first contribution to the series was co-writing, with co-creator Geoff Johns, the first season episode "Going Rogue", which introduces the supervillain Captain Cold/Leonard Snart (Wentworth Miller).

In January 2015, Wu began writing, along with executive producer Andrew Kreisberg and Lauren Certo, the prequel comic book series The Flash: Season Zero.

It introduced the new half of the titular hero, Jax Jackson, and the first ever live action appearance by King Shark.