Brett Rickaby

When Frank shows up uninvited and high to the wedding, he reveals that Sean is still using.

In an effort to be part of the wedding, Frank offers to pay for the reception, but Sean's concerned that he'll just end up hurting Fiona and confronts him - leading to a brawl.

Several of the doctors compete to be the new face of Seattle Grace; April brings an emergency case to the hospital; Alex and Jackson work with a transgender teen couple; new policies test the patience of the staff.

The team investigate the disappearance of three children from a bike path, the location of a similar unsolved disappearance that took place 30 years ago.

While investigating the murder of a young woman, Castle and Beckett find evidence that links her death with Senator William H Bracken, the man responsible for Beckett's mother's murder.

Shocking secrets come to light during an interrogation; the terrorists threaten to escalate the magnitude of their attack.