As in "12pm - 1pm," the first act is devoted to the immediate threat that arose in the last episode, and the rest is devoted to the bigger picture. However, "4pm - 5pm" is certainly not on par with the former.
After Navi dies, the episode seems lost on where to go. Jack and Tony still get their next objective and follow it, but it doesn't have the gusto or the sense of direction that was present earlier in the season. It's simply ANOTHER lead to pursue, and it feels like neither the writers nor the characters really care anymore.
The two big stories running parallel near hour's end are: Jack finding out that Paul Raines may be involved with the terrorists, and Curtis and Marianne going to the Rockland Building. In the former, Audrey decides to help out by going to Paul's hotel room and keeping him in one place. Shades of Elizabeth Nash and Alexis Drazen surface, but Audrey thankfully doesn't go crazy and grab a letter opener. And another thing to be thankful for: Marianne's dead. Some of Marwan's men show up at the Rockland Building, pop a couple in Marianne's chest, and proceed to interrogate Curtis.
This episode gets points from the Curtis thing, but it has the same problem that was present two episodes ago; it doesn't feel special, just bland.
Hourly Highlight:
Jack fighting Navi.