Crackerjack is a British children's television series which was initially aired on the BBC Television Service between 14 September 1955 and 21 December 1984 (with no series in 1971).^[3] The series was a variety show featuring comedy sketches, singers and quizzes, broadcast live with an audience.^[4]

Crackerjack returned in 2020. It was hosted by Sam & Mark, with an exclamation mark added to its original title, and aired on CBBC from 17 January. The second revived series aired from December 2020 to March 2021.^[5]

Its initial long run featured Eamonn Andrews, Max Bygraves, Leslie Crowther, Ed "Stewpot" Stewart, Joe Baker, Jack Douglas, Stu Francis, Peter Glaze, Don Maclean, Michael Aspel, Christine Holmes, Jacqueline Clarke, Stuart Sherwin, Little and Large, Jan Hunt, The Krankies, Basil Brush, Geoffrey Durham, Bernie Clifton, Rod McLennan and Ronnie Corbett, amongst many others.

Performers who appeared as singers/dancers, assisting the host with games, included Sally Ann Triplett (Series 26), Leigh Miles (Series 26–27), Julie Dorne-Brown (Series 27–28), Sara Hollamby (Series 28–29), Ling Tai (Series 29), Jillian Comber and Pip Hinton.

The shows were frantic, being broadcast live in front of an audience largely of children, originally at the King's Theatre^[6] on Hammersmith Road, London, used by the BBC as the King's Studio for live and recorded broadcasts until 1963, then at the BBC Television Theatre (later the Shepherd's Bush Empire). The format of the programme included competitive games for teams of children, a music spot, a comedy double act, and a finale in which the cast performs a short comic play, adapting popular songs of the day and incorporating them into the action.

One of the games was a quiz called Double or Drop, where each of three contestants was given a prize to hold for each question answered correctly, but given a cabbage if incorrect. They were out of the game if they dropped any of the items awarded or received a third cabbage. While the winner took his or her pick from a basket of toys, every runner-up won a much-envied marbled propelling pencil as a prize, which became so popular that in 1961 Queen Elizabeth II, who visited the programme, was presented with Crackerjack pencils for her children Prince Charles and Princess Anne.^[3]

During the early 1970s, high-profile pop guests included The Sweet, Mud, Gary Glitter and, on more than one occasion, Slade.

In 1982, in a bid to boost flagging ratings, Crackerjack introduced gunge into its games and launched a new game called Take a Chance in which the celebrity guests – one female, one male – could score extra points for the contestant they teamed up with by competing against Stu Francis in a quickfire question tie. A wrong answer or the opponent answering first would lead to Francis or the celebrity guest being covered in gunge. The gunge was always given a name relating to a random theme or to the celebrity guest (Howling Wind for Ian McCaskill, for example).

The format of the final Series 27-29 was revived in all but name by Francis in 1987 for Border Television series Crush A Grape. Francis also toured a live version of his era's format for some time after the BBC cancellation, initially under the Crackerjack name but later as The All Star Laughter Show.