Thanks! Yeah I've seen the whole season. I actually missed that it was the same actor, which is funny because I recognized Aaron Paul's voice at the end immediately.

Over all I felt USS Callister suffered because the DNA part was too far fetched and that just ruined it for me. You can check out my review here:

https://steemit.com/blackmirror/@g-com/black-mirror-season-4-reveiws-episode-1-the-uss-callister