Greys Anatomy first premiered on March 27, 2005. In honor of 20 years on the air and the series upcoming 22nd season, The Onion looks back on some of the medical dramas best and worst episodes of all time.Best:Patrick Dempsey Lists the Major Symptoms of Strep Throat(Season 2, Episode 11)To this day, there has yet to be a better or more compelling example of Patrick Dempsey listing the major symptoms of strep throat.Happy Birthday, Meredith Grey(Season 8, Episode 15)Meredith discovers the unknown object stuck in the chest of her patient is none other than Dr. Shepherd, who has hidden inside for a birthday surprise.Its A Small World(Season 5, Episode 14)The Chief suspects the new anesthesiologist may be a Disney adult while Owen treats a porn star with leprosy. Meredith worries she did something wrong during surgery after noticing a spleen on the floor.Yikes, Hopefully Nobody Out There Needs Us(Season 7, Episode 4)In this beloved bottle episode, the whole gang gets trapped inside an MRI machine.The Annoying Doctor(Season 6, Episode 21)In this special season finale crossover episode, The Good Doctor himself arrives at Seattle Grace Mercy West Hospital and starts annoying everyone in sight. When Cristina attempts to kill him but botches the job, Meredith must go against her better judgment and save him.Sexual Healing(Season 6, Episode 3)The hospital gets slapped with a lawsuit after a patient wakes during open heart surgery and catches all of the surgeons having sex in the storage closet.Worst:Im Like A Bird(Season 8, Episode 1)In an attempt at crossover appeal, the entire new crop of interns is made up of the 2013 Seattle Seahawks 53-man roster.A Hard Days Night(Season 1, Episode 1)The new surgical interns first shift at the hospital reveals Sandra Oh is about to be trapped in this waste of a role for a decade of her life.Signs(Season 11, Episode 20)Link treats an elderly puppeteer who may be the Zodiac killer, while Owen punches a CPR dummy. Meredith and Maggie huff nitrous oxide and play flashlight tag in the morgue.The Space You Needle(Season 9, Episode 12)The doctors pay $40 each to go to the top of the Space Needle and realize Seattle is simply not that exciting of a city to see from above.Active Shooter, Again(Season 20, Episode 4)Fans generally agree that the return of mass shooter Gary Clark, now as an unstoppable titanium cyborg rebuilt by rival Seattle Presbyterian Hospital, was a ratings gimmick at best.Pick One(Season 16, Episode 1 Present)Drop in on any random episode from the past six years and its a good bet it will be the worst one ever.The post The Best And Worst Greys Anatomy Episodes Of All Time appeared first on The Onion.