Of course, she was in desperate need of his blood at the time. As she lay on the couch inside of the OV’s invisible, magical cell, the blond vamp tried to convince him to save her. Caroline knew that despite all of Klaus’s wicked deeds — she’d already listed off the people he’d killed... Tyler’s (Michael Trevino) mother, Aunt Jenna (Sara Canning) — there was still something human in him.
“I’ve seen it,” she rasped, close to death. Then she admitted that she’d found herself wishing she could forget all the horrible things he’d done. “But you can’t, can you?” he replied. Instead of answering directly, Caroline told him that she knew he loved her and anyone capable of that emotion could be saved.
It was enough. The hybrid rolled up sleeve, bit down, and fed her his blood.
That’s got to give him some points (though it was his fault she needed saving in the first place), but do you think Caroline will ever really forgive Klaus?