Frankly, outside of the presence of this well-organized hallucination, there's no sign of unbalance. It may not be too serious.
10 seconds sound clip from the Dimension X - The Outer Limit by Graham Doar classic radio play.
You can hear this line at 00:18:50 in the radio play.
Quote context
[...]
- He's blacked out again. I guess that's all.
- You don't think that really happened?
- I don't like to see this. I've seen too many good test pilots snap.
- Steve is the best I've known. How bad do you think he is?
- If he had a more plausible story, I'd be inclined to believe him.
- Did you hear it, Hank? Ya understand?
- Sure, sure, we've been quarantined.
[...]