Knock Knock, Who's Back?

 is the 45th episode of Find the Markers: The Series. It was released on April 30, 2023.

Characters:

 * Purple Marker
 * Archer Marker
 * Baby Marker
 * Ball Marker
 * Bee Marker
 * Big Orange Marker
 * Black Marker
 * Bone Marker
 * Brown Marker
 * Cactus Marker
 * Capless Marker's Cap
 * Carpet Marker
 * Coral Marker
 * Crystal Marker
 * Dark Blue Marker
 * Dragon Marker
 * Dummy Marker
 * Explode Marker
 * Fire Marker
 * Firefly Marker
 * Fishbowl Marker
 * Ghost Marker
 * Gingerbread Marker
 * Grass Marker
 * Industrial Marker
 * King Marker
 * Lava Jump Marker
 * Lavender Marker
 * Lightbulb Marker
 * Liquid Marker
 * Magenta Marker
 * Marker Deleted
 * Marker for the Black Baseplate
 * Markerplier
 * Markerseed the Fallen
 * Maroon Marker
 * Marshmallow Marker
 * Martian Marker
 * Mud Marker
 * Old Marker
 * Periwinkle Marker
 * Permanent Marker
 * Piñata Marker
 * Red Marker
 * Rocket Marker
 * Sand Marker
 * Snow Marker
 * Snowman Marker
 * Sweet Dream Marker
 * Tan Marker
 * Temple Marker
 * Tied Marker
 * Torch Marker
 * Transparent Marker
 * Triple Marker
 * Water Marker
 * Yellow Marker
 * Zombie Marker
 * Bendy Straw Marker
 * Blue Marker
 * Box Marker
 * Brick Marker
 * Catzo Marker
 * Chocolate Marker
 * Cobblestone Marker
 * Cork Marker
 * Crayon
 * Cyan Marker
 * Dark Green Marker
 * Ecosystem Marker
 * Flamingo Marker
 * Feta Cheese Marker
 * Frozen Marker
 * Golden Marker
 * Gray Marker
 * Greedy Marker
 * Hammer Marker
 * Khaki Marker
 * Leaf Marker
 * Licorice Marker
 * Lilypad Marker
 * Lime Marker
 * Marker?
 * Mint Marker
 * Mushroom Marker
 * Oil Marker
 * Olive Marker
 * Orange Marker
 * Pink Marker
 * Platinum Marker
 * Primrose Marker
 * Princess Marker
 * Rainbow Marker
 * Realistic Marker
 * Rock Marker
 * Rust Marker
 * Sandstorm Marker
 * Serenity Marker
 * Salmon Marker
 * Smoke Marker
 * Space Marker
 * Star-ker
 * Static Marker
 * Teenage Mutant Ninja Marker
 * Triple-Scoop Marker
 * White Marker
 * Xanwood Marker
 * Atomic Marker
 * Aurora Marker
 * BFDI Marker
 * Battery Marker
 * Bluish Gray Marker
 * Camo Marker
 * Candy Cane Marker
 * Capless Marker
 * Ceramic Marker
 * Cheese Marker
 * Chicken Marker
 * Cloud Marker
 * Dirt Marker
 * Evil Marker
 * Flan Marker
 * Flower Marker
 * Forgorker
 * Glitch Marker
 * Green Marker
 * Ice Marker
 * Ivory Marker
 * Jumpscare Marker
 * Killbrick Marker
 * Knight Marker
 * Lollipop Marker
 * Magenta Void Marker
 * Marker Stack
 * Merchant Marker
 * Milk & Cookies Marker
 * Missing Texture Marker
 * Nebula Marker
 * Obby Marker
 * Paper Marker
 * Phoenix Marker
 * Plaid Marker
 * Polka-Dot Marker
 * Runner Marker
 * Salted Caramel Marker
 * Shadow Marker
 * Spider Marker
 * Strawberry Marker
 * Vermillion Marker
 * Void Marker
 * Wild Marker
 * Wizard Marker
 * Wood Marker
 * Atmosphere Marker
 * Balloon Marker
 * Bioluminescent Marker
 * Black Hole Marker
 * Bubble Bath Marker
 * Burning Marker
 * Couch Marker
 * Cough Drop Marker
 * Devil Marker
 * Gilded Marker
 * Error Marker
 * Gummy Marker
 * Hot Cocoa Marker
 * Inverted Marker
 * MEGA MARKER!
 * Pebble Marker
 * Plasma Marker
 * Skinny Marker
 * Stormy Marker
 * Sunburnt Marker
 * Sus Marker
 * Teapot Marker
 * Time Marker
 * Winning Marker
 * 90 Degree Marker
 * Alternate Marker
 * Chomik Marker
 * Cornbread Marker
 * Danger Marker
 * Foliage Marker
 * Forbidden Marker
 * Medium Stone Grey Marker
 * Mimic Marker
 * Noob Marker
 * Potion Marker
 * Sunlight Marker
 * Supernova Marker
 * Technical Marker
 * Tree Sap Marker
 * Zen Marker
 * Difficulty Chart Marker
 * Anniversary Marker
 * Clover Marker
 * Lucky Marker
 * Reindeer Marker
 * Santa Marker
 * Abacus Marker
 * Absolute Zero Marker
 * Alien Marker
 * Aloe Marker
 * Artwork Marker
 * Beige Marker
 * Bombastic Marker
 * Bluegrass Marker
 * Cinnamon Marker
 * Cobweb Marker
 * Comet Marker
 * Cowboy Marker
 * Dark Markery
 * Dead Tree Marker
 * Dreamscape Marker
 * Dropout Marker
 * Excalibur Marker
 * Fallen Log Marker
 * Fisher Marker
 * Flytrap Marker
 * Fog Marker
 * Forge Marker
 * Furnace Marker
 * Goat Marker
 * Hotspring Marker
 * Jawbreaker Marker
 * Junk Marker
 * Magma Marker
 * Malding Marker
 * Malware Marker
 * Marker.png
 * Matrix Marker
 * Monochromatic Marker
 * Moonstone Marker
 * Music Marker
 * Nature Marker
 * Oopsie Marker
 * Party Marker
 * Peppermint Marker
 * Persimmon Marker
 * Pine Tree Marker
 * Pinecone Marker
 * Pirate Marker
 * Pixel Marker
 * Popsicle Marker
 * Pretzel Marker
 * Quagmire Marker
 * Quartz Marker
 * Quest Marker
 * Quicksand Marker
 * Quicksilver Marker
 * Rainbow Road Marker
 * Rockslide Marker
 * Rockstar Marker
 * Security Marker
 * Settings Marker
 * Signal Tower Marker
 * Ski Marker
 * Skydiving Marker
 * Stardust Marker
 * Statue Marker
 * Stracciatella Marker
 * Teal Marker
 * Thief Marker
 * Time Rune Marker
 * Tip Jar Marker
 * Uranium Marker
 * Vanilla Marker
 * Vintage Marker
 * Viridian Marker
 * Vitellary Marker
 * Voidstorm Marker
 * Waterfall Marker
 * Weather Forecast Marker
 * Wireframe Marker
 * Left Leg Marker
 * Poopy Blocky Marker
 * Wanted Marker
 * Poopy Blocky Marker
 * Wanted Marker

Transcript:

 * /Transcript

Trivia:

 * This is the third episode to not contain "Marker" in the title