Blade: Angels and Demons
Shen can't help but see the irony of discovering that now Blade and Marcus are on the same side on one issue at least. They both want the purebloods done away with.
Vampires can get drunk, we discover. Krista attacks Marcus while in a drunken rage -- not exactly Jill Wagner's best acted scene in the series, by the way. Once Marcus gets Krista chained up so he can talk rationally to her, he goes on and on about the special bond they will always share, as he is the one who turned her. The bond is stronger than anything, says Marcus, even hate. Here's yet another example of Krista being a more compelling character in the series than its titular character Blade. Krista is the one torn between two worlds, the one whose ultimate fate is still up in the air. As Marcus says, Krista may want to kill him, but she can never kill the part of him that is now inside her forever. This is followed by a sepia-toned flashback to Marcus pre-immortality, in happier times. Starts out very reminiscent of Angel and/or Spike whedonverse flashbacks. Ah, whaddaya gonna do. But his past is pretty brutal, and explains why Marcus hates the purebloods so much.
While that's going on, Blade and Shen (remember them?) break into Cthon to find out what's happened to Krista, plant some spycams, and crack-wise back and forth at each other. Agent Collins, who has almost as much screen time as Blade it seems, (i.e. -- not much) goes rogue and then finds an ally -- and now stands only one degree of separation away from Blade.
After all the flashbacking, Marcus gets the revenge he's waited a hundred years for and becomes a lot more sympathetic to Krista. In fact, she gets so sympathetic to him, that they are too occupied to notice that Chase gets kidnapped by the pureblood kid's big Lurch-like minion. Blade shows up just in time to spy Krista and Marcus taking that shared-bond thing to the next level. Poor daywalker, always outside looking in.