Dora the Explorer, Blue, and Molly from Bubble Guppies are playing tag when a swirling mist forms near the sandbox. Suddenly, glowing alphabet letters float out of the fog, spelling words in midair. The letters twist into the shape of a grinning ghost, its eyes shimmering with mischievous light. "Did you see that? The ghost just spelled 'BOO'!" "I don't like this! Let's get out of here!"

Blue whimpers, tail tucked tight, as the group huddles behind a slide. The letters rearrange into "RUN," glowing brighter. The playground’s colors seem muted now, overtaken by the ghost’s eerie glow. "Arf arf! (We need help!)" "Let’s go find Geo from Team Umizoomi! He’ll know what to do!"

Geo from Team Umizoomi, wearing his signature blue suit, is tinkering with a robot when the friends burst in, breathless and wide-eyed. "Geo, you have to help! There's a scary ghost made of letters chasing us!" "A ghost made of letters? That sounds like a case for Team Umizoomi! Let’s investigate together."

Geo[/@ch_4] examines the glowing letters as they swirl and shift near the sandbox. He uses his super shape power to analyze patterns in the floating words.] The ghostly figure pauses, its form flickering as Geo approaches. The friends gather close, watching as Geo draws shapes in the air with his finger, matching the ghost’s letters. "Wait… These letters are following a pattern. Look, they're spelling out clues!" "Maybe it's not a real ghost after all…"

Milli from Team Umizoomi[/@ch_5] hiding behind a bush, holding a remote control with colorful buttons. The ghostly letters dissolve, swirling around Milli as she giggles, stepping into the moonlight.] Milli wears a playful grin, her hair sparkling with alphabet confetti. The playground returns to its cheerful glow, the tension replaced by laughter. "Surprise! I wanted to see if you could solve my alphabet mystery!" "Milli! You really scared us, but that was a great puzzle!"

They laugh and share cookies shaped like letters, recounting the night’s excitement. Geo and Milli promise more fun puzzles for next time, as everyone feels braver—and closer—than ever. "Arf arf! (Best night ever!)" "Next time, maybe a mystery with cupcakes instead of ghosts?"