Production evidence · reviewed 18 September 2026

Director approaches and production-made puzzle props

First-person accounts identify how the Series 1 directors translated puzzles into images. Separate production evidence identifies puzzle material created for the programme.

Direct testimonySeries 1 coverageNo inferred signatures

Attribution ruleApproach is not the same as authorship of every image.Direction overlaps with writing, cinematography, editing, design, graphics and performance. This register uses a director’s own account and does not assign a shot or object by visual guesswork.

Series 1

Two stated visual approaches

Each record is limited to episodes the director is credited with and choices they describe themselves.

Episodes 1–3

Robert McKillop · spatial puzzles

McKillop describes the police office as a spatial puzzle John must navigate while hiding in plain sight. For the weekly cases, he identifies three different organising ideas: a choreographed movement grid in Episode 1, a house treated as a spot-the-difference problem in Episode 2, and blocked sightlines or tunnel vision in Episode 3.

He also attributes the wide 2.39:1 anamorphic frame and the Episode 1 crane move to collaboration with cinematographer Annika Summerson and production designer Melanie Allen. Those choices are therefore recorded as collaborative, not his work alone.

Episodes 4–6

Jill Robertson · three-dimensional logic

Robertson describes translating the Episode 4 chessboard logic into positions and movement across a real construction site. Her account stresses repeated location planning so that the physical geography and final explanation agreed.

For Episode 5, she records choosing and combining school locations around specific story requirements, including a bell tower, sightlines and the mechanics of a locked door. She also describes the second half of the series as becoming more personal and darker while retaining comedy.

DirectorCredited blockPublic visual-method evidence

Robert McKillopSeries 1 · Episodes 1–3First-person interview verified

Jill RobertsonSeries 1 · Episodes 4–6First-person interview verified

George KaneSeries 2 · Episodes 1–3Credit verified; no comparable first-person visual-method source located

Stella CorradiSeries 2 · Episodes 4–6Credit verified; no comparable first-person visual-method source located

The empty Series 2 cells are deliberate. Recurring composition, colour or editing patterns are not assigned to a director without attributable evidence.

Verified production-made material

Puzzles that had to work, not decorative filler

The evidence confirms bespoke puzzle content; it does not prove that every object seen on screen was fabricated from scratch.

Working prop puzzles

Puzzle consultant Alan Connor says the production required on-screen prop puzzles to be genuine, solvable examples. He gives John’s workstation futoshiki as a specific example: the visible entries had to be logically correct.

Crosswords

Connor’s account establishes that crossword material associated with John’s fictional setter identity was deliberately constructed rather than filled with arbitrary letters. The related Guardian publication is documented separately in the crossword file.

Visual puzzle graphics

Robertson credits Connor and graphics designer Johnny Drewek as the puzzle team for her episodes. Their role was to make sure puzzle content worked on set, including material visible only briefly or in flashback.

Reasoning surfaces

The production-design record identifies an easel, a glass architect’s board and a flipchart as three distinct working stations for John’s reasoning inside the police set.

What remains unconfirmed

The notebook, clocks, cameras, doors and other story objects are indexed by narrative function, but this evidence does not establish whether each was fabricated, adapted, rented or bought.

Classification rule

Production-made is used only for content or graphics that a credited maker says were created for the programme. On-screen object does not automatically mean bespoke prop.

Source trail

First-person and professional records

Making the programme

The making of Ludwig — origin, writing, set design, filming and music