Grey's Anatomy
Add It Up
TV Flash files “Add It Up” as hour 335 of 467 in the TV Flash guide — Grey's Anatomy (2005–present) on ABC, season 15, episode 18, aired 2019-03-21, 60 min.
From the desk
How this hour is filed
This leaf is S15E18: listed hour 335 of 467 in the Grey's Anatomy guide, hour 18 of 25 in season 15. It aired 2019-03-21 (60 min). The listed hour before it is “And Dream of Sheep” (S15E17). Next is “Silent All These Years” (S15E19). Broadcast log — titles and dates, not a plot bible.

Catalog log
Broadcast listing — not a TV Flash recap.
Maggie introduces mood rooms as an alternative approach to medicine. Alex and DeLuca butt heads over an 11-year-old patient who tries to sabotage her own surgery. Jackson and Richard deal with a gender non-binary patient. Meanwhile, Teddy has a pregnancy scare that brings Owen and Koracick to odds.
Viewer FAQ
Where does Add It Up sit in the Grey's Anatomy guide?
S15E18 is listed hour 335 of 467 — hour 18 of 25 in season 15, season 15 episode 18.
When did Grey's Anatomy S15E18 air?
Add It Up aired 2019-03-21 and is listed at 60 minutes.
Where should I start Grey’s Anatomy?
“A Hard Day’s Night.” The intern-year silhouette is the collection’s first look. Starting at a later “event” is how you miss why the hallway still photographs.
In the series
Why this series still plays
Two decades of scrubs as costume change. Watch it for the way a network medical soap taught America to ship, to soundtrack a trauma, and to treat a hospital hallway like a rope line. It is still on — a season closer is not a finale — and the look keeps getting refitted.
The first flash is intern scrubs under Seattle rain, a look so “casual” it launched a franchise. Ellen Pompeo’s Meredith Grey arrives already in a stolen moment with Patrick Dempsey’s Derek that the publicist would later call a meet-cute and the timeline would call McDreamy — which is to say **this was not a soft launch; this was a hard launch in cotton**. Sandra Oh’s Cristina, Chandra Wilson’s Bailey, the original intern class: a seating chart that became an empire. ABC wanted a medical procedural. Rhimes sent a…
Filed against
- Ellen Pompeo as Meredith Grey
Ellen Pompeo has narrated Grey's Anatomy as Meredith Grey longer than some medical residencies last — McDreamy mythology, cast churn, and soundtrack tears as brand. She became the rare network lead who outlasted eras of TV economics. TV…
- Sandra Oh as Cristina Yang
Sandra Oh’s Cristina Yang made Grey’s Anatomy sound like a surgical dare — Meredith’s person, hallway trauma as a rope line, and Shonda Rhimes teaching network television to ship in scrubs. On TV Flash she is the intern-class steel that…
- Patrick Dempsey as Derek Shepherd
Patrick Dempsey’s Derek Shepherd launched Grey’s Anatomy as a hard launch in cotton — intern scrubs, Seattle rain, and McDreamy as brand architecture. Shonda Rhimes taught network television to ship. TV Flash still treats the hair as a…
- Katherine Heigl as Izzie Stevens
Katherine Heigl’s Izzie Stevens is Grey’s Anatomy vulnerability as tabloid weather — early-season fluorescent glamour, a first-look collection the series later had to survive. Awards talk and gossip in the same corridor. On TV Flash she…
- Justin Chambers as Alex Karev
Justin Chambers’s Alex Karev is Grey’s Anatomy’s long-shift surgeon heat — glamour under fluorescent light, a hospital as a fitting room that never closes. Early-season premiere energy that forgot to end. On TV Flash he is network…
- Chandra Wilson as Miranda Bailey
Chandra Wilson’s Miranda Bailey has ruled Grey’s Anatomy longer than some residencies — Nazi-to-chief evolution, soundtrack tears, and Emmy-winning steel. Longevity as power on Shonda Rhimes’s network medical soap. TV Flash files her…