Knuck Knuck! Who's Here?

"Knuck Knuck! Who's Here?" is the sixty-fourth episode in the Sonic Boom television series. It first aired on 28 January 2017 in the United States.

Synopsis
While battling Eggman, Knuckles suffers amnesia. When reminded that he’s the last of his kind, he sets out to find a foster family.

Appearances
Characters:
 * Badniks
 * Bee Bot (multiple)
 * Crab Bot (multiple)
 * Motobug (multiple)
 * Ball Bot
 * Belinda
 * Charlie
 * Child Monkey
 * Comedy Chimp
 * Dave the Intern
 * Dr. Eggman
 * Fennec Male
 * Gogobas
 * Gogoba Chief
 * Lady Goat
 * Lady Walrus
 * Mrs. Dave's Mom
 * Mrs. Vandersnout
 * Old Monkey
 * Professor Cluckins
 * Rabbit Girl
 * Team Sonic
 * Amy Rose
 * Knuckles the Echidna
 * Miles "Tails" Prower
 * Sonic the Hedgehog
 * Sticks the Badger
 * Walrus Baby
 * Walrus Child
 * Warthog Male

Locations:
 * Sonic Boom World
 * Angel Island
 * Seaside Island
 * Gogoba Village
 * Sonic's Shack
 * Tails' House
 * Unnamed Village
 * Village Center
 * Mayor's Mansion
 * Meh Burger

Items:
 * Amy's Hammer
 * Charlie's Mech Suit
 * Communicator
 * Fuzzy Puppies
 * Enerbeam

Vehicles:
 * Eggmobile

Continuity

 * Knuckles claims he cannot count very well. This was proven in "Cowbot".
 * Charlie is still a supervillain as a result of the events in "Counter Productive"; Charlie also mentions said events.

Trivia

 * Nine days before this episode aired on Boomerang, Bill Freiberger released the title card for this episode on Twitter as a teaser.
 * This episode borrows elements from the backstory of Knuckles' mainstream counterpart, who is the last of the Knuckles Clan and the echidna race entirely.
 * The title of this episode is a parody of the 1970 song, "Knock, Knock Who's There?"
 * The book Lady Walrus reads at the beach uses the same model as the book Sonic tried to return in "Late Fees".
 * One of the pictures in Charlie and Belinda's house depict a photo of Tails' House.
 * The movie Knuckles, Charlie and Belinda watch during the montage sequence is the same one Team Sonic saw in "Hedgehog Day".