Season 0 of What on Earth? premiered on March 26, 2016.

Season 1 of What on Earth? premiered on February 10, 2015.

Season 2 of What on Earth? premiered on January 25, 2016.

Season 3 of What on Earth? premiered on November 15, 2016.

Season 4 of What on Earth? premiered on October 17, 2017.

Season 5 of What on Earth? premiered on January 8, 2019.

Season 6 of What on Earth? premiered on June 6, 2019.

Season 7 of What on Earth? premiered on January 9, 2020.

Season 8 of What on Earth? premiered on August 27, 2020.

Season 9 of What on Earth? premiered on March 11, 2021.

Season 10 of What on Earth? premiered on October 24, 2021.

Season 11 of What on Earth? premiered on June 22, 2022.

Season 12 of What on Earth? premiered on January 12, 2023.