In 'Eternal', Tess pushes the existence of Davis Bloom to the brink when she decides to plant an explosive inside his car and blow him while he's inside.
A clip of "Smallville" episode "Eternal" has been given a sneak peek through a clip. Davis wanders out in a deserted place with spade in his hand. Tess then shows up in front of his car saying "I forgot. What's the prayer for dismembering a body?" before she blows up the truck.
This April 2 episode will reveal a lot of the history of David Bloom who will later become Doomsday. While Davis seeks help from Chloe, Tess pleads for Clark's assistance in killing Davis. This will then lead to the final confrontation between Doomsday and Clark.
The official synopsis of the episode has given a spoilery bit, revealing that Davis escapes the blast which then prompts Tess to go to Clark. Tess reveals Davis' secret childhood with the Luthors and hints that she knows Clark's true identity.