Saw this in the mid 70s on American TV: 3 brothers (who may be brothers in real life) end up at a mad woman scientist’s lab. She has always wanted to conduct an experiment with a helpless baby boy and a tiger, but had only daughters, coincidentally 3 of them. One brother is strapped down to his bed and taken down to the lab where he is stripped and dumped in with the tiger. The other brothers & the 3 daughters show up just in time to save him. The 3 brothers leave with the 3 daughters. Any help would be greatly appreciated!