Oliver may have gone off to Star City with his new wife Chloe on Smallville, but he's back this week to help Clark on a very dangerous mission: heading to the Phantom Zone.

The hero team will venture into the alien prison after they learn an escape portal has been found, so they need to make sure no one else can leave. However, the Phantom Zone is full of surprises, particularly the return of General Zod, who has taken control.

Check out this clip of Clark and Oliver's journey to the P.Z.





Smallville airs Friday at 8pm on the CW.

(Image and videos courtesy of the CW)