Weekend TV picks: 'Orphan Black,' 'Game of Thrones,' 'Anne Frank: Beyond the Diary'

* GAME OF THRONES. 9 p.m. Sunday, HBO.

Where's Arya? The younger of the two Stark daughters (Maisie Williams) wasn't in last week's Season 5 premiere, but she's far from forgotten. This weekend, she finally gets off the boat she boarded in last year's finale.

* ORPHAN BLACK. 9 p.m. Saturday, BBC America.

The storytelling's twistier than ever, and as Season 3 opens Tatiana Maslany continues to dazzle in multiple roles. I might be willing to watch an entire show about her soccer mom clone, Alison (below right, with Kristian Bruun), and yet that's just scratching the surface.

* MISSION CRITICAL: HUBBLE. 8 p.m. Sunday, Science Channel.

The Science Channel marks the 25th anniversary of the Hubble telescope with three hours of space-related programming, beginning with this account of the Space Shuttle Atlantis crew's 2009 repairs to NASA's eye in the sky.

* WEED: THE MARIJUANA REVOLUTION. 9 p.m. Sunday, CNN.

Dr. Sanjay Gupta continues his reports on medical marijuana with a look at scientists who've found a way around federal roadblocks to research.

* ANNE FRANK: BEYOND THE DIARY. 10 p.m. Saturday American Heroes Channel.

Eva Schloss is among those interviewed in this documentary. She's an 85-year-old Auschwitz survivor and childhood acquaintance of Anne Frank, and her very presence serves as a reminder that if the young diarist had survived, she, too, might still be alive to talk aboutwhat happened next.