The shows on Tuesday nights are new. The two-hour long Monday night episodes of How the Universe Works and Space's Deepest Secrets are recycled but labeled as new. I'm not surprised that some of the content is shared.
Some of the people on both programs plus some others appear on almost all of the astronomy programs aired in recent years, including the now defunct The Universe on History. There are many scientists, however, who have appeared on only one episode of a show.
https://www.imdb.com...ef_=tt_ov_st_sm - Space's Deepest Secrets cast
https://www.imdb.com...ts?ref_=tt_ql_1 - How the Universe Works cast
There are many different writers, producers, and directors listed over the history of both shows.
Space's Deepest Secrets is a Red Marble Media production. I haven't found the company/companies that produced/produces How the Universe Works but it's not Red Marble Media.
Flight 33 Productions produced The Universe.
All in all, I thought it was a very interesting episode.