Set where? Gambling was criminalized in the UK in 1541 and Europe's first legal gambling house didn't open until 1638. Maybe they learn roulette strategy and s

Set where? Gambling was criminalized in the UK in 1541 and Europe's first legal gambling house didn't open until 1638. Maybe they learn roulette strategy and show up right after Pascal invented the roulette wheel while he was trying to produce a perpetual motion machine (which could play a role in the time machine's tech itself too, which could resemble a "grande roue," visually akin to a g-force centrifuge or particle accelerator).