Star Trek and CBS are doing their part to support the Black Lives Matter movement with a special event - today only.

According to an announcement from CBS, #StarTrekUnited is two events in one: one part education and entertainment, and one part fundraiser. First off, there’s the education/entertainment part, where they’ve curated a selection of 15 of the most culturally relevant Star Trek episodes that you can stream - for FREE - for a limited time.

The 15 episodes are:

• Star Trek season 1 episode 25, “The Devil in the Dark”

• Star Trek season 3 episode 10, “Plato’s Stepchildren”

• Star Trek season 3 episode 15, “Let That Be Your Last Battlefield”

• Star Trek: The Next Generation season 2 episode 9, “The Measure of a Man”

• Star Trek: The Next Generation season 3 episode 7, “The Enemy”

• Star Trek: The Next Generation season 4 episode 21, “The Drumhead”

• Star Trek: Deep Space Nine season 6 episode 13, “Far Beyond the Stars”

• Star Trek: Voyager season 3 episode 6, “Remember”

• Star Trek: Voyager season 4 episode 4, “Nemesis”

• Star Trek: Enterprise season 4 episode 20, “Demons”

• Star Trek: Enterprise season 4 episode 21, “Terra Prime”

• Star Trek: Discovery season 2 episode 6, “The Sound of Thunder”

• Star Trek: Picard season 1 episode 1, “Remembrance”

• Star Trek: Picard season 1 episode 2, “Maps and Legends”

• Star Trek: Picard season 1 episode 3, “The End is the Beginning”

Starting today, June 17th, you can stream all 15 of these episodes for free on CBS.com, StarTrek.com and PlutoTV. If you’re a Twitch user, you can stream them there too, but only today.

Now, it’s not just free TV that CBS is giving away. They’ve also pledged a donation to prominent Black Lives Matter groups. According to the CBS announcement, “For every fan that tweets using the hashtag #StarTrekUnitedGives, $1 will be donated to organizations supporting the Black Lives Matter movement, including Black Strategy Fund, Movement for Black Lives, and Black Lives Matter - Los Angeles.” There doesn’t appear to be an upper limit here, but it is just for the one day - today - only. So get out there and tweet your support for #StarTrekUnitedGives and show CBS All Access that you care about the Black Lives Matter movement too.