Chain Reaction is an American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 game show

Game show

A game show is a type of radio or television program in which members of the public, television personalities or celebrities, sometimes as part of a team, play a game which involves answering questions or solving puzzles usually for money and/or prizes...

 created by Bob Stewart, in which players compete to form chains composed of two-word phrases.

The show aired three separate runs: Bill Cullen

Bill Cullen

William Lawrence Francis "Bill" Cullen was an American radio and television personality whose career spanned five decades...

 hosted the original series on NBC

NBC

The National Broadcasting Company is an American commercial broadcasting television network and former radio network headquartered in the GE Building in New York City's Rockefeller Center with additional major offices near Los Angeles and in Chicago...

 from January 14 to June 20, 1980. The second version aired on the USA Network

USA Network

USA Network is an American cable television channel launched in 1971. Once a minor player in basic cable, the network has steadily gained popularity because of breakout hits like Monk, Psych, Burn Notice, Royal Pains, Covert Affairs, White Collar, Monday Night RAW, Suits, and reruns of the various...

 from September 29, 1986 to December 27, 1991 and was hosted first by Blake Emmons

Blake Emmons

Blake Emmons is a Canadian country music singer and entertainer.Emmons is famous in Canada for his music, as well as his hosting of the 1974 CTV series Funny Farm, the Canadian answer to Hee Haw....

 and later by Geoff Edwards

Geoff Edwards

Geoffrey Bruce Owen "Geoff" Edwards is an American television actor, game show host and radio personality. Over the past decade and a half, he has been a writer and broadcaster on travel. He was born in Westfield, New Jersey....

. Another version, hosted by Dylan Lane

Dylan Lane

Dylan Lane is an American television game show host. Although he was born in Tyrone, he was raised in Huntingdon, Pennsylvania. He graduated from Huntingdon Area High School in Huntingdon....

, premiered on August 1, 2006 on GSN

Game Show Network

The Game Show Network is an American cable television and direct broadcast satellite channel dedicated to game shows and casino game shows. The channel was launched on December 1, 1994. Its current slogan is "The World Needs More Winners"...

.