Commanders Worf and Jadzia Dax plan their long-awaited wedding. Since Dax will be joining Worf's surrogate family, the House of Martok, she agrees to endure the traditional evaluation by the mistress of the house, Martok's wife, Sirella. Confident that she will be liked and accepted, Dax is surprised when she learns that as a non-Klingon she will almost certainly fail to gain Sirella's favor. Learning that Sirella disapproves of Dax, Worf asks Martok to intervene. Martok refuses to get involved, but agrees to participate in Kal'Hyah, the traditional Klingon "bachelor party". Captain Sisko, Chief O'Brien, Dr. Bashir and Alexander, Worf's son, join them, but are disappointed when they learn that unlike what they imagined the Klingons' idea of a bachelor partyto be, is actually light on fun and heavy on ceremony, fasting, bloodletting and various Klingon forms of torture. Dax endures her own form of Klingon torture as she struggles to please Sirella. When asked to recite the history of the House of Martok, Dax reveals her discovery that Sirella has no imperial blood, and is descended from a concubine, which infuriates Sirella. Dax throws herself a pre-wedding party. In the midst of the drinking, debauchery and a fire dance by Dax's Samoan friend Lieutenant Manuele Atoa, Sirella enters, and demands Dax join her for a ritual. When Dax tells her to leave, Sirella threatens to cancel the wedding. The confrontation ends with Sirella declaring Dax an enemy. The next morning, Worf informs Dax that Sirella has forbidden her to join the House of Martok. He asks her to beg Sirella's forgiveness, but Dax refuses to endure any further humiliation just so Worf can have a Klingon ceremony. Worf and Dax call off the wedding. Martok convinces Worf to apologize to Dax, but she refuses to change her mind. Determined to see the lovers wed, Sisko goes to see Dax. She describes the indignities to which she has been subjected, reminding Sisko that, as Curzon Dax, she was Federation Ambassador to the Klingon Empire. Sisko points out that even though she shares Curzon's memories, she is a new person, and that Sirella sees her only as a young woman who wants to marry into her family. Sisko states that Dax knew what she was getting into when she agreed to marry Worf, and she must honor the traditions of his people. Warmed by her deep love for Worf, Dax follows Sisko's advice, and they are married with Sirella's blessing.
Reception
In 2019, CBR rated "You Are Cordially Invited" the 13th funniest Star Trek episode. In particular they note that Bashir and O'Brien ready to enjoy what they presume to be a party, must endure a night of arduous Klingon alien rituals with Worf. In 2018, SyFy included this episode on their Jadzia Dax binge-watching guide for this character.
