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when did mark sloan join grey's anatomy

Mark Sloan first appears in Grey’s Anatomy in season 2, episode 18 (“Yesterday”), and then officially joins Seattle Grace as a series regular in season 3, starting with the episode “Sometimes a Fantasy” (October 2006).

Quick Scoop: When Did Mark Sloan Join Grey’s Anatomy?

If you’re googling “when did mark sloan join grey's anatomy” , you’re really asking two related things:

  1. When does he first show up on screen?
  2. When does he actually join the hospital as part of the core cast?

1. His first appearance (the true “entrance”)

  • Mark Sloan (Eric Dane) first appears in Season 2, Episode 18 – “Yesterday”.
  • At this point, he’s a hotshot plastic surgeon visiting from New York and Derek’s old best friend, not yet a permanent presence at Seattle Grace.
  • This is also when he earns the nickname “McSteamy” thanks to his very memorable introduction.

So, if you’re asking what episode he first appears in, the answer is:

Season 2, Episode 18 – “Yesterday” (guest appearance).

2. When he actually joins Seattle Grace

  • Mark returns in Season 3 and decides to relocate to Seattle to try to repair his friendship with Derek.
  • He takes the job as the new attending plastic surgeon and head of plastics at Seattle Grace.
  • Eric Dane is credited as a series regular starting with the Season 3 episode “Sometimes a Fantasy” , first aired in October 2006.

So, if you mean “join the hospital and main cast”:

He joins Seattle Grace as an attending and becomes a regular in Season 3 (starting with “Sometimes a Fantasy,” October 2006).

3. Simple breakdown

  • First on-screen appearance: Season 2, Episode 18 – “Yesterday” (guest star).
  • Joins as attending at Seattle Grace: Season 3 (relocates to Seattle and takes over plastics).
  • Becomes a series regular: Season 3, “Sometimes a Fantasy” (October 2006).

Mini forum-style note

If you ever see fans debating this in forums, they’re usually splitting hairs between:

“He joined in S2 because that’s when we first saw him”
vs.
“He joined in S3 when he moved to Seattle Grace and became part of the main cast.”

Both are technically right, depending on what you mean by “join,” but for most show guides and cast lists, Season 3 is considered the point where Mark Sloan officially joins Grey’s Anatomy.

Information gathered from public forums or data available on the internet and portrayed here.