Ep. 2: Mari accompanies Dr. Gilbert as he theorizes about Earth's magnetism while Waka and her brother investigate Mr. Hayase's lab.
Aired on July 16, 2016

Mari spends time with Dr. Gilbert while he hypothesizes about the Earth's magnetism. Meanwhile, Waka and her brother search Mr. Hayase's lab for signs of Mari.
Episodes
- Ep. 1 · Mari and Waka's Cake Plan Disrupted by Time Travel to Meet William Gilbert
- Ep. 2 · Mari accompanies Dr. Gilbert as he theorizes about Earth's magnetism while Waka and her brother investigate Mr. Hayase's lab.
- Ep. 3 · Mari meets Ben Franklin after school lesson and helps with kite experiment
- Ep. 4 · Mari encounters an unexpected guest of Alessandro Volta and gains insight into her father's location.
- Ep. 5 · Faraday feels disheartened as Waka's time travel wish goes awry
- Ep. 6 · Waka learns dedication and overcoming failure while stuck in 19th century London