Warning: SPOILERS for For All Mankind Season 5, Episode 4 - "Open Source"For All Mankind season 5 has a youth movement that hearkens to the cadets of Star Trek: Starfleet Academy — without the hate. For All Mankind season 5, episode 4 begins the sci-fi saga's post-Admiral Ed Baldwin (Joel Kinnaman) era. Ed's daughter, Kelly Baldwin (Cynthy Wu), and grandson, Alex Poletov Baldwin (Sean Kaufman), pick up the pieces a month after the controversial but beloved astronaut passed away.