## What this is A 3D recreation of the Timeline Detective, a fictional cozy locked-room mystery where Inspector Halloran can step between two simultaneous timelines (and a third that emerges at minute 5). The crime is a stolen heirloom locket from the master bedroom of fictional Whitford Manor (distant cousin of NEXLOGIC's Mr. Whitford). In Timeline A the gardener Mr. Pip is the suspect — his footprints in the conservatory pin him there. In Timeline B the dowager Mrs. Pemberton is the suspect — her tortoiseshell hair-pin was found in the wine cellar. In Timeline C (revealed at the mid-cycle twist) the butler Mr. Brookline emerges. Five manor rooms across three timelines: Bridgehouse Library (fireplace + wing-back where Bytes the cat naps), Conservatory (orchids + stained glass), Wine Cellar (oak racks + tasting table), Garden Maze (yew hedges + fountain), Master Bedroom (vanity + the empty locket display). Each room has its own palette × 3 timelines, with five sublocations per room. Halloran walks between timelines through doors that switch palette mid-step. 19 director cameras including splitscreen-A-vs-B, timeline-fork, third-timeline-twist, evidence-board, and final-accusation. Eight named suspects with guilt flags per timeline plus Ms. Felling (secretary), Reggie Halberton (chauffeur), Doc Wendell (family physician), Cordelia Bramble (poet niece), and Mr. Whitford (manor owner, gracious throughout). 89+ named entities total. The HALLORAN BRAIN panel top-right shows his deductions in real time (GOAL "find locket" / NEED "alibi for Mr. Pip" / HAVE "footprints in conservatory" / PLAN "interview · cross-reference · accuse · resolve" / STEP / MOOD "intrigued"). Drama ladder 0-100 with eight named rungs and progress bar. Timeline Fork Panel A/B lanes fade the wrong timeline at stakes ≥ 90. The mystery *remembers*. localStorage saves `timeline_detective_v1` (cycle, drama meter, twist fired, suspect leaderboard) AND writes to `recurring_cast_v1` (halloran/pemberton/whitford/bytes counters). Crossover chyron reads `meridian_cruise_v1`, `thornpike_job_v1`, `auralis_court_v1` (gracefully falls back if absent). Each ten-minute reseed runs a new locked-room case. You don't play it. You watch it. And it remembers across three other demos. ## Why this is mind-blowing The chyron is the secret weapon: "Cycle 4 — Halloran in Timeline B examines Mrs. Pemberton's hair-pin. He remembers her jigsaw on the SS Meridian was at piece 423. He turns to the wine cellar — and Mr. Brookline the butler appears in the doorway." That single line stitches two timelines AND a crossover AND the mid-cycle twist in one beat — Halloran on the Wine Cellar Timeline B close camera with the hair-pin catching the oak rack's amber light (drama ladder rung 6 of 8 "Pemberton evidence", chyron pulls jigsaw line from `meridian_cruise_v1`), Mrs. Pemberton on the splitscreen-A-vs-B side with the camera fading her Timeline A version (stakes ≥ 90 fades the wrong timeline, recurring cast pemberton +1), and Mr. Brookline the butler on the third-timeline-twist close camera with the doorway palette shifting from Timeline B's burgundy to Timeline C's slate (twist fires `triggerTwist()`, splitscreen overlay shows 3-way palette, drama ladder ticks to 8 of 8 "third suspect emerges"). The mid-cycle twist is the heart: at minute 5, Timeline C branches into existence — the butler did it after all, in service to a higher fictional cause. Halloran's eyes go wide; his brain panel updates the GOAL to "diplomatic accusation". Multiply that by eight named suspects each with their own brain panels and guilt flags per timeline, Halloran physically walking between timelines through palette-switching doors, a CROSSOVER CHYRON reading three other demos, an 8-rung drama ladder, and a third-timeline twist that genuinely re-frames the case, and you've got a Knives-Out-meets-Doctor-Strange stream that genuinely earns its multiverse scope. Tone is COZY: stolen LOCKET macguffin (no violence shown), gracious dialogue, Bytes the cat naps on the wing-back, ALL FICTIONAL.