In 2005,

series 1 The IBM Series/1 is a 16-bit minicomputer, introduced in 1976, that in many respects competed with other minicomputers of the time, such as the PDP-11 from Digital Equipment Corporation and similar offerings from Data General and HP. The Seri ...

of ''

Doctor Who ''Doctor Who'' is a British science fiction television series broadcast by the BBC since 1963. The series depicts the adventures of a Time Lord called the Doctor, an extraterrestrial being who appears to be human. The Doctor explores the u ...

'' was released on

Universal Media Disc The Universal Media Disc (UMD) is a discontinued optical disc medium developed by Sony for use on its PlayStation Portable handheld gaming and multimedia platform. It can hold up to 1.8 gigabytes of data and is capable of storing video games, ...

(UMD) format in four parts. The first part of

series 4 Series 4 could refer to: * Aston Martin Lagonda Series 4, the automobile model * BMW 4 Series, the automobile model line * GeForce 4 series, line of nVidia video cards * Scania 4-series, the truck model line * South African Class 6E1, Series 4, e ...

also received a UMD release in 2009. They are only playable on

Sony , commonly stylized as SONY, is a Japanese multinational conglomerate corporation headquartered in Minato, Tokyo, Japan. As a major technology company, it operates as one of the world's largest manufacturers of consumer and professional ...

PlayStation Portable The PlayStation Portable (PSP) is a handheld game console developed and marketed by Sony Computer Entertainment. It was first released in Japan on December 12, 2004, in North America on March 24, 2005, and in PAL regions on September 1, 2005, ...

and have no region locking. The releases were ultimately discontinued due to disappointing sales.

Releases

Ninth Doctor releases

Tenth Doctor releases

See also

Notes

References