What is Slow Horses S2-4's IQ Score?

Slow Horses S2-4 has an IQ Score of 163/200 on TV Intelligentsia's Intelligence Quotient framework, placing it in the Masterclass tier. The score breaks down to 43/50 Cognitive Stimulation, 36/50 Educational Value, and 44/50 Craft & Quality.

Is Slow Horses S2-4 educational?

Slow Horses S2-4 is strong on Educational Value, 36/50 on TVI's rubric, which rates the density and integration of substantive information within the work.

How does TV Intelligentsia calculate IQ Score?

TV Intelligentsia's current published formula is round((Cognitive Stimulation × 0.4 + Educational Value × 0.35 + Craft & Quality × 0.25) × 4), scoring titles from 0 to 200 across five tiers. TVI publishes a three-dimension breakdown only when those values reproduce the displayed composite. The framework is published at tvintelligentsia.com/methodology/.

Slow Horses S2-4 IQ Score 163/200

Slow Horses S2-4 has an IQ Score of 163/200 on TV Intelligentsia's Intelligence Quotient rubric, placing it in the Masterclass tier.

By Jordan Robinson, MD, MPH·Updated 2026-08-22·Methodology

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163/ 200

Masterclass

Exceptional cognitive and educational substance, delivered with craft that sustains close attention

Score Breakdown

Legacy score. Published under our earlier workflow, before the current standard took effect in August 2026. A founder reviewed and approved it against our methodology, under a process that does not meet the standard we hold now. What this means →

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Cognitive Stimulation/50

Educational Value/50

Craft & Quality/50

IQ = round((Cognitive × 0.4 + Educational × 0.35 + Craft × 0.25) × 4) · How we score →

What these dimensions mean

Cognitive Stimulation: observable narrative complexity, conceptual density, ambiguity, inference, and sustained intellectual demands in the work.
Educational Value: the density and integration of substantive academic, historical, scientific, cultural, ethical, or practical information in the work.
Craft & Quality: production excellence in service of the work, its direction, writing, performance, and aesthetic intent.

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Why you should trust this score

Scored under Jordan Robinson, MD, MPH

Physician and founding editor. Maintains the adult catalog against the published rubric and reviews the rubric application.

Methodology

Published rubric, v1.3.1

Formula

round((C × 0.40 + E × 0.35 + Q × 0.25) × 4)

Database scale

2,606 titles, version-controlled

How we stay independent. Editorial scores are not for sale. TVI may take on paid advisory or research work, but no commercial relationship buys coverage, advance access to scores, favorable treatment, or a change to a published finding. We pay for our own streaming subscriptions, and no reviewer sees sponsor data or affiliate revenue tied to a score. More about how we work →

The TVI Take

The later seasons of Slow Horses, the Slough House team faces increasingly significant threats. Gary Oldman remains exceptional.

The quality is consistent across all seasons. Mick Herron's novels provide strong source material.

People & Production James Hawes · See-Saw Films · Apple TV 22 connections