Peter painfully learns that someone close may have betrayed him and Claude. Matt's world spirals out of control when radioactive man Ted Sprague and Hana Gitelman, a fierce young woman with "wireless" mental abilities, drop into his life. After blood is spilled, Hiro makes a difficult decision about his mission.

To present participles which come from intransitive verbs, or are themselves employed as adjectives, to mark the absence of the activity, disposition, or condition implied by the participle;

Not expected; coming without warning; sudden.

not expected or anticipated; "unexpected guests"; "unexpected news"

Victorian Rowhouse Meets Austin Powers (See Zen-Like Contemporary)

not foreseen; "unsuspected difficulties arose"; "unsuspected turnings in the road"

Unexpected is the 4th episode (production #105) of the television series Star Trek: Enterprise.

made necessary by an unexpected situation or emergency; "a forced landing"

not planned; "an unexpected pregnancy"