In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.
Q: Sentence1: Ted was a soldier in the Vietnam war. Sentence2: He couldn't seem to shake the awful memories of things that happened. Sentence3: He went to a doctor and begged for drugs that would help him forget. Sentence4: The doctor gave him medicine that didn't help. Sentence5: Finally, Ted sank into a perpetual alcoholic haze to forget.
A:
Ted, Doctor