"Identified" is the pilot and first episode of UFO, a 1970 British television science fiction series about an alien invasion of Earth.
Whilst en route to a secret meeting with the British Prime Minister, Colonel Ed Straker (Ed Bishop) and General Henderson's (Grant Taylor) Rolls-Royce Phantom VI and two escort police motorbikes are attacked by a UFO.
SHADO is hidden beneath Harlington-Straker, a working film studio used as cover for the underground base.
Following a fire at Westbrook Electronics, Colonel Freeman (George Sewell) is piloting a transporter aircraft from Los Angeles which contains top secret Utronic equipment to track UFOs in deep space, plus its creator Colonel Virginia Lake (Wanda Ventham).
SHADO control authorise Skydiver submarine to launch the Sky One interceptor aircraft piloted by Captain Peter Carlin.
An injured alien occupant survives the UFO crash and is examined at SHADO's medical laboratory.
It transpires that the alien's heart comes from Carlin's sister, who disappeared in the 1970 UFO incident shown at the beginning.
During late 1968, Gerry and Sylvia Anderson collaborated with producer Reg Hill and writers Donald James and Tony Barwick to develop the format for the series and the pilot episode Identified.
Towards the end of April 1969, following five months of pre-production, principal photography for the pilot episode began with Gerry Anderson directing at MGM-British Studios in Borehamwood.
Second unit filming took place at Burnham Beeches in Buckinghamshire; this included the UFO attack on Straker and Henderson's Rolls-Royce.
When the episode was first broadcast on 16 September 1970, it was seen by ATV's tenth-largest audience for that week, having achieved 36 ratings points.
[7] Rating it the tenth-best episode of UFO, review website anorakzone.com describes "Identified" as "not a particularly striking introduction to the [series'] concept".