Tomorrow marks the 200ths episode of Grey's Anatomy. That's a lot of freaky cases, career triumphs, laugh out loud moments, shattering heartbreak, and devastating deaths. Even at its lowest points the show never fails to entertain — there's a reason it's still a hit 10 years in — and when it's firing on all cylinders it's one of the most gripping things on TV.

In honor of the show's 200th episode, we've taken a look back and picked 10 of its best episodes ever. Let's hope there are plenty more like these to enjoy as the show starts trucking it's way towards 300 (hey, it could happen!)

Season 2, Episodes Episode 15/16: "It's The End of the World"/"As We Know It"

This two-parter earned Shonda Rhimes an Emmy nomination for writing, and its easy to see why. Bailey in labor, a bomb in the hospital, Mer asking Derek about their last kiss — it was everything Grey's Anatomy should be.

Season 2, Episode 27: "Losing My Religion"

Because of this episode, we'll never be able to listen to "Chasing Cars" without bursting into tears. The devastating end to Izzie and Denny's flash of a relationship is still one of the most heartbreaking things we've ever seen on TV, period.

Season 3, Episodes 15/16/17: "Walk On Water," "Drowning on Dry Land," "Some Kind of Miracle"

Mer coming to terms with some complex memories thanks to a ferry crash that almost made her give up on life? Again, this is the kind of story that shouldn't work, but did.

Season 5, Episode 24: "Now or Never"

As you'll see as this list goes on, we're all about the season finales. Cand can you blame us? The Post-It wedding, "John Doe" drawing 0-0-7 on Mer's palm, Izzie flatlining, that elevator ending — this is another one of those emotional rollercoasters this show is so damn good at.

Season 6, Episodes 23/24: "Sanctuary"/"Death and All His Friends"

A shooter in the hospital? It should have been preposterous, but this is Shonda Rhimes we're talking about here — one of her greatest talents is turning the preposterous into the riveting (see: all of Scandal). This two part finale was a nail-biter from moment one, thanks to sharp writing, solid directing, and spot-on acting. Our hearts were racing, our eyes were rarely dry, and we'll never forget it.

Season 7, Episode 1: "With You I'm Born Again"

A bang as big as the Season 6 finale could have led to a lackluster follow up, but this tense, emotional episode started the season off right, setting the stage for a year that was lighter on the huge deaths, but brilliantly emotionally complex.

Season 7, Episode 18: "Song Beneath the Song"

We know the musical episode is a love it or hate it kind of a deal, but we totally love it. Sure, we're pretty certain a car accident doesn't actually make you hallucinate that the world is a musical, but this cast is overflowing with singers so talented, the ludicrousness of the premise didn't even matter. We still tear up when we listen to the soundtrack, and that's all we can ask.

Grey's Anatomy Season 8, Episode 24: "Flight"

Did we like what happened in the Season finale? No, not at all. Were we glued to the TV with our jaws on the floor? Yes, definitely. Plus, Mark's goodbye to Lexie is as moving as anything this show has ever produced.

Season 9, Episode 2: "Remember the Time"

This episode gave us the direct follow-up to the plane crash that we'd all been waiting for, and it moved us to tears just like we wanted it to. It could have made it to this list for the Cristina bath scene alone.

Season 10, Episodes 1/2: "Seal Our Fate"/"I Want You With Me"

OK, so the Season 10 premiere might be too recent for us to really have a good perspective on it, but we have to say, we loved it. Any episode that made us care that much about the interns is good in our books!

What are your favorite Grey's Anatomy episodes? Sound off in the comments below!

Catch the 200th episode of Grey's Anatomy on Thursday, October 10 at 9 p.m. ET/PT on ABC.

Rebecca Martin is an Associate Editor at Wetpaint Entertainment and our resident Game of Thrones, Breaking Bad, and genre TV expert. Follow her on Twitter and Google+!