Brooks & Marsh confirm air dates November 26-December 31, 1956.
They describe it as offering contestants "the opportunity to win up to $50,000 for correctly guessing whether famous show-business personalities could successfully perform certain stunts." Typical of the period, the first round was relatively low ($1,500) and doubled with each round and an incorrect guess meant the contestant took home 10% of what he or she had won up to the miss (i.e., the second round guess was worth $3,000 if correct and $150 if incorrect).
The only two celebrities identified by B&M were Sal Mineo (operating a construction crane) and Rory Calhoun (performing an archery feat).