In part two of "5 Brains, 5 Months," enter a world that's strange even to a zombie girl detective: the world of competitive skeeball! While Gwen is busy with the unfinished business of the latest brain she's eaten, Ellie tests her new ghost powers, while Spot continues going underground. And in the "Dead Presidents" backup, we visit the headquarters of V.E.I.L. and meet the mysterious head of the team.