In "Billy Gets an A" Grim magically changes Billy's grade from F to A, which disturbs the fabric of reality. In "Yeti or Not, Here I Come", Grim tries to rip the Abominable Snowman who has been cheating death for a very long time.
In "Nergal's Pizza", Nergal and Grim start rival pizza franchises. In "Hey, Water You Doing?", a trip to a water park goes south when Billy, Mandy and Grim all wind up underwater and a mermaid falls in love with Billy.
In "Company Halt", Hector Con Carne and his army arrive in Endsville and try to lure Skarr back to their side. In "Anger Mismanagement", Grim, Skarr and Mandy all receive help in trying to keep their tempers in check.
In "The Most Greatest Love Story Ever Told Ever" Nergal Jr. accidentally asks Mandy to the Valentine Day dance, making Irwin jealous. In "Detention X" Grim becomes a substitute teacher and sends all the kids into the Detention Dimension.
In "Dracula Must Die!" Lionel Van Helsing wants to kill Dracula for stealing his girlfriend, and Grim tries to save his childhood hero. In "Short Tall Tales" Grim tells ridiculous stories about Pecos Billy, Paula Bunyan, and John Henry.
In "Nigel Planter and the Order of the Peanuts" Nigel steals Grim's scythe to exact revenge on his former school. In "The Incredible Shrinking Mandy" Billy uses the scythe to shrink Mandy, but messes up and she starts to grow instead.
In "El día de los muertos estupidos" the gang travels to Mexico where Billy finds his long lost twin brother. In "Heartburn" Billy and Mandy use Grim's camera that reveals true heart, and discover a disturbing truth about Irwin.