Supernatural Season 10 Spoilers: New Episode 'The Executioner's Song' Clip Released

The CW's Supernatural returns with a new episode tonight, and Cain will finally make his return to the series as Sam and Dean Winchester try to remove the Mark of Cain from Dean's body. A new episode clip shows Cain's return.

Check out the clip below, in which Sam and Dean follow a trail to Cain, only for Castiel to find him first in a disturbing way.

As for the plot of the episode itself, how will it unfold? The "Matt's Inside Line" column at TVLine has some information.

"Will Sam meet Cain in this week’s Supernatural episode? Is there going to be a parallel between Cain/Abel and Sam/Dean? –JJ
The Winchesters will certainly be hoping that Cain can help them out with their Mark problem. 'Let me say this: I think the episode with Cain is really great,' executive producer Jeremy Carver says of Timothy Omundson’s return on Tuesday. When Dean seeks out the former Knight of Hell for some guidance, 'from Cain’s point of view, he thinks he’s being helpful. That’s cagey and mysterious and deliberate in the way I’m saying that. But once you see the episode, you’ll see what I mean.'"

In case you missed our review of the latest episode, we didn't enjoy it too much:

"After a decade on television, Supernatural needs to innovate to stay fresh. But an episode like tonight's proved that maybe, after 10 years on the air, Supernatural is starting to run out of gas. This is not to say that Supernatural is a bad show, because it's far from that. But it might be a show that's better served in trimming down to 13 episodes a season instead of 22 and focusing just on its heavier mythology rather than these Monster of the Week episodes.

What do you think of the clip? Let us know in the comments section.