Concentration was a TV game show based on the children's memory game of the same name. It has aired on and off from 1958-1991, hosted by various hosts, and played in various ways. The property has been seen in several different versions:

The original network daytime series, Concentration, aired on NBC for 14 years, 7 months and 3,796 telecasts (August 25, 1958 - March 23, 1973), the longest run of any game show on that network (Wheel of Fortune was a month shy of tying that record when the initial NBC run ended in June 1989). This series was hosted by Hugh Downs and later by Bob Clayton. For a brief period in 1969, Ed McMahon hosted the series. The series began in the 11:30 a.m. (Eastern) time slot, then moved to 11 a.m., and finally to 10:30 a.m. Nearly all episodes were produced at NBC's studios at 30 Rockefeller Plaza, New York City.

A once-a-week nighttime version of the show appeared in two separate broadcast runs on NBC. The first edition appeared only for four weeks, from October 30, 1958 to November 20, 1958, with Jack Barry as the host. The second edition was on the air from April 24, 1961 to September 18, 1961, with Hugh Downs as the host.

The second version of Concentration was syndicated, with Jack Narz as host. It ran from September 10, 1973 through September 8, 1978.

A third version of Concentration was first piloted in 1985. The pilot was hosted by Orson Bean, but no network or syndicator bought the show. However, after some reformatting, a remake of the game called Classic Concentration, hosted by Alex Trebek, aired on NBC from May 4, 1987 to September 20, 1991 (with reruns airing through the end of 1993).

Despite numerous attempts to develop a new version in recent years, NBC (the rights holder) has not yet authorized a new version of the program.

Two contestants, one a returning champion, competed to solve a rebus concealed behind a 30-space board. Each contestant called out a pair of numbers on the board which contained the names of prizes, humorous joke prizes and WILD and action cards (the latter three explained later). No match passed control to the opponent, but a match gave whatever prize was printed on the card or allowed him to perform an action, revealed two pieces of the rebus (identifying a person, phrase, place, thing, etc.) and allowed him/her a chance to solve the rebus. WILD cards provided an automatic match, while TAKE cards allowed the contestant at that moment to snatch a prize his/her opponent might have in their possession. A FORFEIT card meant the player immediately had to give up one of the prizes he/she had in his possession. The joke prizes (things such as a banana peel, a button, etc.) actually served as insurance markers against opponents TAKE cards and the FORFEIT cards he/she might stumble upon. Only upon correctly solving the rebus does a player actually win what he/she claimed from the board; the loser forfeits all his gifts. Originally, there was no bonus game; later in the run came "The Envelope and its Mysterious Contents" (which hid cash amounts or a prize such as a car), and still later, "The Cash Wheel" which allowed a player to win up to $2,000 cash. Champions continued until either defeated or by winning 20 games; the top winners each season returned to play a "Tournament of Champions." During the original run of "Concentration," the show reportedly gave away 512 cars, 397 boats, 1,287 domestic and foreign trips and cruises, 12 trips around the world, 857 fur coats and numerous diamonds not to mention all the travel trailers, airplanes, swimming pools, furniture and countless other items (one history on the show reported the total prize giveaway at $10 million). Written by Brian Rathjen

A popular, classic game show, hosted by Hugh Downs, Ed McMahon, Jack Barry and Bob Clayton (NBC Daytime/Prime Time) and by Jack Narz in syndication. Contestants would choose a pair of squares from a grid of 30. Under each square was a prize. If the prizes matched, the contestant got to keep them, and a piece of the rebus puzzle underneath the squares was revealed. The contestant who was able to solve the rebus was the winner of the game and won all the prizes he or she had accumulated. Written by Jean-Marc Rocher

An updated version of the classic game show, hosted by Jack Narz. Contestants would choose a pair of squares from a grid of 30. Under each square was a prize. If the prizes matched, the contestant got to keep them, and a piece of the rebus puzzle underneath the squares was revealed. The contestant who was able to solve the rebus was the winner of the game and won all the prizes they accumulated during the course of the game. Written by Jean-Marc Rocher

Syndicated five-day-a-week revival of the classic NBC game show, which appeared just six months after the network canceled the show after 3,796 airings. Two new contestants competed each day. As before, the players competed to solve a rebus concealed behind a 30-space board. Each contestant called out a pair of numbers on the board which contained the names of prizes and WILD and action cards (the latter three explained later). No match passed control to the opponent, but a match gave whatever prize was printed on the card or allowed him to perform an action, revealed two pieces of the rebus (identifying a person, phrase, place, thing, etc.) and allowed him/her a chance to solve the rebus. WILD cards provided an automatic match, while TAKE cards allowed the contestant at that moment to snatch a prize his/her opponent might have in their possession. A FORFEIT card meant the player immediately had to give up one of the prizes he/she had in his possession. Only upon correctly solving the rebus does a player actually win what he/she claimed from the board; the loser forfeits all his gifts. The winner played a bonus round called Double Play, with a new car as the top prize for solving two rebuses within 10 seconds. Later in the show's run, players determined their Double Play prize package by choosing two squares from a 9-space board and competing for the first prize package matched. Written by Brian Rathjen