S8.E4. Encounter with Martha who hugs her
Martha knowing something is just not right confronts Kate at the precinct looking to put a good word in for Rick.  Kate shows emotion, promises that they are not divorcing and relishes the hug Martha gives her.

S7.E6. Sorenson’s wedding invitation

Kate gets a wedding invite to Sorenson’s nuptials but she was not ready for someone else’s perfect day.  This has her thinking back to the Hampton’s car crash and his missing two months.

S6.E7. Upset Alexis did not ask her for help

Alexis is part of a law review team trying to exonerate a man on death row but have been unsuccessful.  Reluctantly she has to ask Castle for help.  She also incorporates the help of Lanie, Ryan and Javi much to the dismay of Kate who fosters insecurities that she will be a bad step mom.

S5.E13. Having to protect Brackin from assassin’s

After finally figuring out it was Bracken who ordered her mom killed, a weird twist of fate has Kate guarding him against a would-be assassin.  Kate is very conflicted to the point of flirting with destroying evidence.

S8.E3. Kate having second thoughts about going after LokSat with Vikram

So now on her own, Beckett is going after LokSat.  Waiting on Vikram, Kate mulls her decision and has a chance to back out but she must get justice.

S5.E23. Castle being oblivious to her feelings for more of a relationship

After Caskett successfully defeat the machines, Agent Stack requested a word with Beckett and offered an opportunity to interview with FBI. In the alternate ending to this episode, Kate asks about their relationship and Castle babbles on making her take pause about their relationship.

S5.E24. Castle leaving her, wanting to talk, conference with dad

So with a lukewarm reply from Castle about their relationship, Kate takes the interview with the AG office and of course, aces it.  Now she must choose between Castle and career.  But once Castle finds out she did not consult him over such a life changing event, he storms out.  He sulks and she gets guidance from her dad.  The Castle calls saying they need to talk..

S8.E7. Castle at divorce attorney

Trying to solve a case involving the elite of Manhattan, the boys talk Castle into going undercover to the best divorce lawyer in the city.  Of course he is wearing his day glasses so they can do surveillance.  Beckett busts them but the sees Castle being asked about divorce and hesitated in responding.  This makes Beckett concerned that they may break up to the point where she questions Rick after anniversary get together

S8.E15. Getting the LokSat truth from Castle.

So somehow Castle knew about LokSat during his missing time and now confesses to Beckett.  Kate needs time to process this news.  They drink over it instead of talking and then ponders her future and whether it is still with Rick

S8.E2. Deciding to leave Castle

Let’s just say The scriptwriters gave Rita some bad lines to deliver to Kate.  Beckett tried to sell the ending but none of us were buying it.  More than just Kate went down the proverbial rabbit hole on this one.

S3.E1. Sees Castle who did not call all summer

After the awkward departure for the summer, Rick fails to call the 12th and therefore Beckett to say he was back.  She finds out by seeing a sign fir a book signing and a life size cardboard cutout.  Next thing you know he is at a crime scene hovering over a dead body with a gun in his hand.  Needless to say Bevkett is pissed and hurt that he did not come back.

S5.E1. Knowing Brackin was responsible for the murderof her mother but knowing she could not kill him

After resigning from the force, Ryan pulls Beckett into the investigation.  Somehow thru the bags of confetti, the discover Bracken is behind the 

Demise of Johanna.  Beckett takes matters into her own hands and somehow overcomes her emotions to settle the score with the senator.

S3.E22. Royce killed

Her mentor, get friend, the one she first loved is gunned down in an alley.  Kate goes rogue all the way to LA to track down the killer.  Her again she somehow overcomes her instinct to kill the scumbag responsible.