the final version of the endgame was introduced) and the right to play for $10,000 in the bonus round. The losing player received $5 a point for playing (changed to parting gifts with the third endgame). Instant Reaction In the bonus round, the two celebrities from the winning team attempted to get the contestant to guess a series of words or phrases by constructing a question one word at a time. The celebrities alternated giving words to construct the question, then hit a bell signaling the contestant to respond. Cash was awarded to the contestant for every correct response. In the first format (which only lasted the first week of the series), the team was staked with $1 and had a 60-second time limit. Each correct response added one half of a zero behind the $1, meaning that after two correct responses the player would win $10, after four the player would win $100, and so on up to the $10,000 maximum. For the next four weeks, the time limit was increased to 90 seconds, and the first correct response was worth $1, with the next three each adding a zero behind it. At that point, the contestant's winnings would be $1,000 and the next four correct responses each added $1,000 to their total. The ninth overall correct response augmented their total to $10,000. The third format had the same time limit, but each of the first nine correct responses was now worth $100, and the tenth correct response increased the contestant's winnings to $10,000. After two weeks, the format was slightly modified so that the contestant was staked with $100 at the start of the round, thus reducing the number of correct answers needed for a $10,000 win to nine. If at any point a contestant provided an incorrect response, a celebrity gave two words in succession, accidentally gave part of the answer, or passed the word, the word was thrown out and gameplay continued to the next word. Champions remained on the show until they were defeated or until they won ten matches. Stewart later developed and expanded the bonus round of Chain Reaction into the game show Go. Still later, "Instant Reaction" was revived as the bonus round on the first Dylan Lane-hosted version of Chain Reaction. USA/Global The second version of Chain Reaction premiered in 1986, airing on the Global Television Network in Canada and the