The Fugitive Doctor noted that no-one had jurisdiction in interstellar space, thus there were no defined laws or crime. (TV: Fugitive of the Judoon [+]Loading...["Fugitive of the Judoon (TV story)"])
On 3 June 1980 a large object left Mars orbit for interstellar space. (PROSE: The Dying Days [+]Loading...["The Dying Days (novel)"])
In 2021 the Seventh Doctor recounted to Hex the CyberMondan's history, explaining they "armoured themselves against the aching cold of interstellar space". (AUDIO: The Harvest [+]Loading...["The Harvest (audio story)"])