What's the best Caskett eppy's from S3 and S4?

Well, I like Cuffed from this season, it's fun! Otherwise, last season finale and this season opening were emotional but liked 'em.

Imo the best ones from season 3 are 3x17 "Countdown" (between life and death - so exciting) and 3x22 "To amor and Die in L.A." (confessions - so sweet). From season 4 probably 4x10 Cuffed is the most caskett one, it's "kinky" and you'll know what I mean.

I like the most 3x17 and 3x10

Ooh so hard to pick. I tend to like the darker episodes but I adore the lighter episodes just the same so I'm gonna have to pick 2 episodes from each season. Season 3: I loved 3x10 'Last Call' because it was light and fun but it also had a family dynamic to it. For a más serious episode of the season 3x24 'Knockout' was pretty intense, featuring Beckett's struggle with her mother's murder, Montgomery's betrayal and ultimate demise and of course the graveyard shooting. Season 4:My favourite upbeat episode tied, both 4x06 'Demons' and 4x10 'Cuffed' were fantastic and funny with just the right amount of cute moments thrown in.. for a darker look at Castle, 4x09 'Killshot' was very intense and emotionally moving. But my judgement of season 4 isn't fully complete yet because I haven't seen it all.

Well that's my two cents.

That's easy: "Knockdown" Season3 Eps13. Ryan & Esposito get kidnapped and castillo & Beckett kiss...

episode 21 from season 3 ... castillo says he was jealous... just died

episode 22 from season 3
episode 1 from season 4