The Kratts' Memory Book is the third episode of the series. It aired on September 29, 1013.
During a day off, the crew find the Kratt bros’ memory book. Reading it, they learn about the brothers’ first adventures and remember how the Wild Kratts first met. But Zach has plans for that memory book…
In a day off the team takes to clean up the HQ, they find the Kratts' Memory Book, the bros' journal. In the first chapter they read, it's related by a younger Martin's point of view the day when Chris arrived home.
- The episode was tweaked a bit after the arrival of Tamishii.
- This was one of the few episodes that Yara wrote by herself.
- Hunter added the foreshadow of Martin having powers almost a year after the original writing was made public.