Adam was being sarcastic in saying that no one would be on Collin's ship.
If it helps:
sar·casm ( P ) (särkzm)
A cutting, often ironic remark intended to wound.
A form of wit that is marked by the use of sarcastic language and is intended to make its victim the butt of contempt or ridicule.
Do not make fun of my Swiss heritage. I can jolly well speak as good English as you can. I was educated in Zurich, Switzerland in a British Academy, and then transferred to one of the leading private schools in San Diego county.
Fine. Now I know Adam was being sarcastic. SO WHAT? I don't need a BBC definition of the word. I wanted to know WHO was sarcastic, not WHAT sarcastic means.