Season 1 of Be Cool, Scooby-Doo! debuted on Cartoon Network from October 5, 2015, to March 21, 2016, for 20 episodes; episode 21 aired on March 23, 2016, on Boomerang, and episodes 22-26 aired on Boomerang on June 20, 2017.
Cousin Scott invites Fred and the gang on his cruise ship, which terrifies the water-fearing Velma. As they get out to sea, they find a fish creature hunting for sunken treasure.
Scooby gets to meet his favourite dog actress, Lady Annabelle, but his too star struck to talk to her. To make matters worse, a gargoyle is attacking the newest set.
An old player returns from the grave to haunt the Middleton Baseball Stadium, the favourite Minor League Baseball stadium of Shaggy, who must now act brave and actually face the monster, if he doesn't want it to be closed down.
Fred lets a museum guide lead the gang, who manages to do better than Fred, while Fred tries to manage a group of little kids. Meanwhile, Daphne takes up falconry.
The gang take part in a monster mystery party, which becomes real, but solving the mystery is difficult for Fred and Velma, who's role hinder their abilities, while it seems to do the opposite for Daphne, Shaggy, and Scooby.
The Gang have to pretend to be a rock band to investigate a ghostly performer haunting her former venue. Velma wants it solved fast, so she doesn't have to sing.
Mannputer Tech is light years ahead of its competitors, but a new robot takes over the building and turns it against everybody, making the gang have to rely less on technology and more on themselves.
Daphne's dream of meeting alien life might not be what she expected when she gets caught in a vicious game of cat and mouse with one at Area 53, two levels higher than Area 51.
Daphne just wants to be able to celebrate her birthday, which is right on Christmas Eve, while Fred is determined to solve a Christmas mystery. Unfortunately, all he can get is one with a Pterodactyl, which has nothing to do with Christmas.
Fred is set on visiting the Vault, a high security prison, which is hampered by mistrust of a sandwich thief and maybe more importantly the ghost of an escaped inmate.
A gremlin sneaks aboard the maiden voyage of Air Gigantica, which reveals Daphne reveals she has a great knowledge about, when the gang are invited for a ride.
Daphne reveals an ancient Blake family castle in Ireland, which is being further damaged by an angry, rampaging giant. This brings out the knight in Fred, and the Irish in Daphne.