The Dalmatian Family takes a vacation to Cornwall.
- Spoilers start here.
Protagonists Dolly and Dylan start off the summertime special with a musical number called "Summer Sun." The entire Dalmatian family sings this song on a bus until the Dalmatians arrive at their destination: Cornwall. At the end of the bus ride, Dylan catches his eyes on a slim and casual-seeming female dog with with fluffy neck fur, light blue eyes, and a bushy tail. Dolly hopes for sunny weather with surfing and beach play, but it unfortunately starts to rain. Dylan is excited because he is getting "a shower while getting ready at the same time." A random seagull approaches Dylan and asks for his chips. Dylan says no, but the seagull grabs his bag of supplies anyway. Dylan is as well annoyed at the 'locals.' The strong wind accompanied by the rain knocks Dylan's half-set up tent, having both Dylan and the tent fly about in the air. The female dog, now known as a Border Collie, sits next to Dolly and takes a bit of amusement in Dylan's preoccupied antics. Dylan finds some heavyweight objects and sets them down on the corners of the tent to secure it. He hops into the tent and just at that moment the rain stops, much to his annoyance. The Dalmatian pups and the female Border Collie skip out of the bus, happy that the rain has stopped. Dylan is looking at his map when the Border Collie intervenes a chat with Dylan. She says that the spots on Dylan's ear resemble the constellation of Canis Major, the Dog Star. Dylan agrees, but Dolly rudely interrupts with 'Ooh, barf alert!' Dylan gets embarrassed and continues talking with the she-dog about Canis Major. The Border Collie leans in a little and narrows her eyes. Dylan thinks that she is slightly irritated or suspicious, when she was really trying to point out a wasp on his nose.
Dylan yells in fear at the wasp and runs all around the area of their destination. The Border Collie laughs at him again. Dylan knocks over a tent, revealing Doug and Delilah, who were about to kiss. He dashes past Dante, Dolly, and the Border Collie, only to bump into a cow's rump. Dante is suspicious about the cow, as usual. Dylan reassures Dante, but doesn't finish his sentence because he offended the cow by saying that cows are "super dumb". Dolly and the Border Collie strut off, commenting on Dylan's attitude in disbelief and amusement. Dylan thinks the cow doesn't even understand him and attempts to speak to the cow slowly. He asks "do you speak dog?" The cow responds by mooing absentmindedly, but the cow is kidding and really does know how to talk to Dylan and other animals. Dylan tells the cow that he and his family are from Camden Town in London in that same slow tone. The cow's short reply is followed by getting smacked by a bunch of toys from the Dalmatian pups. Dylan casually apologizes about his siblings and continues tracking down the beach.
Bessie growls menacingly and Dante realizes he was right. Frightened, he warns Dylan about her. Bessie quickly changes her face and points to a so-called shortcut to the beach: a rocky, steep alley with sharp debris of nature, leafless and lifeless trees, and fog for special effects. Dylan does not seem intimidated by the alley and leads his family to the ominous path.
- Spoilers end here.
- Josh Brener as Dylan
- Michaela Dietz as Dolly
- Rhashan Stone as Doug
- Ella Kenion as Delilah
- Kyle Soller as Dante
- Margot Powell as Dorothy
- Nefeli Karakosta as Dizzy
- Florrie Wilkinson as Dee Dee
- Rhys Isaac-Jones as Dawkins
- Bert Davis as Diesel
- Maxwell Apple as D.J.
- Akiya Henry as Da Vinci
- Nikhil Parmar as Deepak
- Lauren Lindsey Donzis as Destiny and Déjà Vu
- Abigail Zoe Lewis as Dallas
- Rocco Wright as the Dimitri Trio
- Aimee-Ffion Edwards as Summer
- Olly Murs as Spike
- Miriam Margolyes as Bessie
- TBA as Chips
- This marks the second two-part special for the show.
- This marks Olly Murs' first voice acting role.
- A preview of this episode (the "Summer Song" musical number) was shown at the Annecy Film Festival. The sound effects during this song, however, are louder in the full episode.
- Both Dylan and Dante break the fourth wall in this episode: Dylan trying to tell Dolly they do not have time for a musical number, and Dante saying "Previously on 101 Dalmatian Street!" at the beginning of Part Two.