We have more intel on the season two premiere of Blue Bloods.
The episode will be titled "Mercy" and it will feature guest star Kelli O'Hara in a key role.
The three-time Tony Award nominee will portray Lisa, a close friend of Erin's whose marriage is not what it initially appears.
On the small screen, O'Hara has appeared in All My Children and Numb3rs.
[Photo: Tuukka Jantti/Pacific Coast News]