Here's a look at tonight's sci-fi TV:
Dollhouse, "Epitaph Two" – We head back to the future (2020 to be exact) as Echo and crew fight to undo the mindwipe-ocalypse in the series finale of Dollhouse. Can a stress-addled Topher save the world with his brand new futuretech? Will Paul and Echo live happily ever after? We'll find out tonight. (8 p.m. ET on Fox)
Smallville, "Disciple" – Oliver's old teacher The Dark Archer (Andromeda's Steve Bacic) heads to Metropolis and sets his sights on Lois and Chloe. Clark and Speedy are pulled into the drama as Oliver looses control of the situation. (8 p.m. ET on The CW)
Caprica, "Rebirth" – Digital Zoe deals with her download into the real world while the Graystones learn more about their daughter's past and her connection to the bombing. (9 p.m. ET on Syfy)
Head after the jump for clips and more TV picks.