Plot:

Oliver tells Clark he must kill Davis, as Doomsday is a serious threat and must be stopped at all costs. However, Clark struggles with taking a human life, so the Green Arrow and his team decide to take matters into their own hands. Lois takes on Tess, but the fight takes a shocking turn. Meanwhile, Chloe gets caught in the middle of Oliver and Clark’s battle over killing Davis.

Synopsis:

The Season 8th finale of Smallville is going to be a big shock for the viewers. Death is hovering in this episode called "Doomsday" as two characters will meet their Doom where one of them is a Smallville vet. Clark (Tom Welling) is met by his old Futuristic friend Rokk (Ryan Kennedy) who time travel backs to Smallville. Davis Bloom (Sam Witwer) is going to meet his destiny as he fully becomes his Doomsday self. Clark tries to stop Doomsday, Doomsday and Clark showdown will leave Smallville in Chaos but In the End one of them has to go down. who will that be? Is Clark strong and smart enough to take on Doomsday? What is a Future Legionary Hero doing in Smallville? Will Chloe (Allison Mack) and Davis relationship meet an sudden but a devastating End? 

Watch Smallville Doomsday Season 8 Finale