4. The bomb exploded, and the CT player couldn't save __ in time.

The sentence refers to 'the CT player'. While 'CT' can be male or female, 'himself' is a common default pronoun when gender is unspecified or irrelevant in this context. The bomb exploding implies a failure to save something, likely the bomb or the site, which is done by the player. Therefore, the CT player couldn't save himself.