[s5e22] | What A Difference A Day Makes

: George O'Malley faces an emotional crisis when almost all the students from the accident die under his care, leaving him devastated until Owen Hunt helps him see the lives he did save.

: Despite the shift in plans, the wedding remains a fan favorite, featuring the original "MAGIC" interns (Meredith, Alex, George, Izzie, and Cristina) as the wedding party.

In , the Season 5, Episode 22 milestone titled " What a Difference a Day Makes " is a landmark 100th episode that originally aired on May 7, 2009. It is widely celebrated for its emotional depth, shifting from a planned grand wedding for Meredith and Derek to a poignant ceremony for Izzie Stevens and Alex Karev. The Unexpected Wedding [S5E22] What a Difference a Day Makes

: Alex delivers a powerful, spontaneous speech adapted from a valedictorian's graduation address, promising to be accountable to Izzie through any future challenges. Medical Drama and Character Growth

: To promote the 100th episode, ABC created a real wedding website for Meredith and Derek that fans could actually visit and RSVP to. : George O'Malley faces an emotional crisis when

While the wedding takes center stage, the hospital remains in chaos due to a tragic car crash involving college students on their way to graduation.

: As a wedding gift, Derek gives Meredith her first solo surgery—a successful colon surgery overseen by Richard Webber. It is widely celebrated for its emotional depth,

: Creator Shonda Rhimes noted that Denny's appearance in this episode was meant to represent "Death," which is why he wore black and spoke sparingly compared to previous appearances.