Here’s another example from SNL in 2017:
Especially now that we have dry-erase boards. I think that’s what they used in Brooklyn 99, didn’t they?
Timely comic:
I always assumed they are a take-off on flow charts. Wiki says those were introduced in 1921. The evidence versions have more “jumps” then flow but they are trying to make it all flow.
Another timely comic, plus CATS.
I just noticed this thread, following the bump.
It’s interesting that this same thing, a big board with a bunch of clippings connected by strings, can mean either “brilliant detective solves baffling case” or “lunatic has insane conspiracy theory,” depending on whether the board is owned by a good guy or a bad guy.