The series has entered its fourth season in 2010.

It appears the series has entered the public domain.

The first 9000 series entered service in January 2001.

The current series of notes entered circulation on 29 April 2010.

The 371 series set entered service on 16 March 1991.

While the third series of Space: 1999 never actually entered production, the producers and studio had originally intended continuing the show.

The series entered its fifth and final season in 2005.

As the series entered reruns after cancellation, more scenes were cut.

Both the 225-0 and 225-5000 series entered revenue service from 1 December 2010.

Over the last decade, a series of other atypical drugs, free from association with the blood disorder, have entered the market.