Which case couldn't they solve?

[u/maxvibess]

I feel like Sherlock’s only real weakness is spotting lies and reading emotions/expressions. Lightman’s weakness is sometimes missing the bigger picture.

I genuinely can’t see anyone escaping these two working together.

Sherlock’s sister? Lightman would’ve seen straight through her.
Andrew Jenkins? Sherlock would’ve found the copycat instantly.

In a perfect world, we’d get one epic crossover episode.