The War Games is the seventh and final serial of the sixth season of the British science fiction television series Doctor Who, which originally aired in ten weekly parts from 19 April to 21 June 1969. It was the last regular appearance of Patrick Troughton as the Second Doctor, and of Wendy Padbury and Frazer Hines as companions Zoe Heriot and Jamie McCrimmon. It was also the story where the Doctor's race, the Time Lords, were revealed. It is the 50th story of the series, and the last Doctor Who serial to be recorded in black and white. Plot On an alien planet the Doctor uncovers a diabo...

Mastermind or Master Mind is a code-breaking game for two players. The modern game with pegs was invented in 1970 by Mordecai Meirowitz, an Israeli postmaster and telecommunications expert. It resembles an earlier pencil and paper game called Bulls and Cows that may date back a century or more. Gameplay and rules The game is played using: *a decoding board, with a shield at one end covering a row of four large holes, and twelve (or ten, or eight, or six) additional rows containing four large holes next to a set of four small holes; *code pegs of six (or more; see Variations below) differ...

The fourth wall is the imaginary "wall" at the front of the stage in a traditional three-walled box set in a proscenium theatre, through which the audience sees the action in the world of the play. The idea of the fourth wall was made explicit by philosopher and critic Denis Diderot and spread in 19th-century theatre with the advent of theatrical realism, which extended the idea to the imaginary boundary between any fictional work and its audience. Speaking directly to or otherwise acknowledging the audience through a camera in a film or television program, or through this imaginary wal...