| 'SPACE: 1999' is a British television series that originally aired from 1975 to 1977. http://imdb.to/2mBpRBB
Ennio Morricone did not contribute to the TV series itself, but to the Italian feature film  edited from the series.
As in the rest of the world, the series was aired on Italian television using the original Barry Gray [and others] music.
"In addition to the series being shown on television, three episodes were edited together into a compilation and shown in cinemas. ... The Italian title is SPAZIO 1999 (with no colon). ... The compilation used music from Ennio Morricone in place of Barry Gray's theme." http://bit.ly/1ZV0MMi / http://bit.ly/1qooTqM / http://bit.ly/1Y7DK3u / http://bit.ly/1qooOmJ
Opening credits: "Musiche composte e dirette da Ennio Morricone" http://bit.ly/2mT3pV4
SPAZIO 1999 was released in early 1976. Morricone had already recorded the music in 1975.
See in this regard: http://bit.ly/1TwcVXq
Tracks belonging to the Italian SPAZIO 1999 movie:
3:11 – Le train [aka "Spazio 1999", track 18 on 2016 CD] – Voice: Edda Dell'Orso
First released on 45rpm:
Le train [from SPAZIO 1999 ] / Orient Express [from PER LE ANTICHE SCALE ] – RCA Victor BB 6396 – France – 1979 www.chimai.com/index.cfm?module=MUS&mode=ALB&id=2661
Front sleeve: www.chimai.com/resources/uploads/79-le-train-45rpm-front.jpg
A-side label: "RCA Victor BB 6396 – 1979 – Ennio Morricone et son orchestre – Edda Dell'Orso" http://bit.ly/2ewp0dH
Part 2: http://bit.ly/1SwCwL4