Fionna and Cake – with the help of the former Ice King, Simon Petrikov - embark on a multiverse-hopping adventure and journey of self-discovery. All the while a powerful new antagonist determined to track them down and erase them from … Madeleine Martin, Roz Ryan, Tom Kenny, Dee Bradley Baker, Kayleigh McKee, Donald Glover, Andrew Rannells Added on HBO 2023-09-04.