TCA: Discovery+ unveils doc slate for first half of 2021 Discovery Inc.’s newly launched streaming service, Discovery+, has lifted the veil on its documentary slate for the first half of 2021, featuring a mix of festival favorites and docs exclusively ... February 11, 2021 Discovery Inc.’s newly launched streaming service, Discovery+, has lifted the veil on its documentary slate for the first half of 2021, featuring a mix of festival favorites and docs exclusively launching via the platform. Among the docs making their way to Discovery+ in the first half of the year: Hot Docs audience award winner The Walrus and the Whistleblower (pictured);