With Grace Van Pelt

While his intense attraction is revealed as early as Season 1 Episode 2, a recurring subplot is Rigsby's infatuation with Grace Van Pelt begins in season 2. During the first several episodes of the season , Rigsby repeatedly tries to work up the courage to tell her his true feelings but loses his gumption, leading to Cho to deadpan "You're gonna die alone".^[3] She returns his feelings in "Red Scare", after Rigsby says he doesn't care about the CBI and that he just wants to be with her. Near the end of the episode, they share their first real kiss.

In "Black Gold and Red Blood", Van Pelt and Rigsby seem to be dating and greet each other happily at a crime scene. However, Rigsby tells Van Pelt he thinks Jane may know about their relationship. In the following episode, "Red Bulls", Van Pelt and Rigsby argue about him not wearing a bulletproof vest to canvass an apartment building. Van Pelt is shot multiple times in the chest while questioning a young woman, but survives with a bulletproof vest on. When Van Pelt is taken to an ambulance, Rigsby says he loves her. Van Pelt slaps Rigsby and tells him next time, he has to wear a bulletproof vest.

In the episode "Bleeding Heart", he and Van Pelt announce their relationship to the team. Lisbon says she will take action and report their relationship to the head of the CBI, but later changes her mind in "Redline" and tells Rigsby and Van Pelt not to have physical contact with each other while at the office.

In the episode "The Red Box", Madeleine Hightower, the new head of the CBI, mysteriously discovers Rigsby's relationship with Van Pelt and informs Lisbon, who feigns ignorance.

In "Aingavite Baa", Hightower gives Van Pelt and Rigsby an ultimatum: they can be in a relationship only if one of them leaves the unit. As they walk out of Hightower's office, Rigsby and Van Pelt say they love each other. Rigsby, after being in a shootout, tells Van Pelt he will get another job so they can be together. However, at the end of the episode, Grace breaks things off by saying she doesn't want the responsibility of making Rigsby leave the CBI. Rigsby pleads with her to talk it through, but Van Pelt simply says she knows herself and walks away, leaving him heartbroken. Van Pelt is later seen crying while walking into the office elevator.

In the episode "Bloodhounds," Rigsby dates criminal profiler Dr. Montague and shows interest in seeing her again. However, using her knowledge of behavioral patterns, Dr. Montague gently turns Rigsby down, stating he is clearly in love with someone else (which Rigsby does not deny).

During the third season, Van Pelt begins dating FBI Agent Craig O'Laughlin. In the episode "Blood for Blood," Van Pelt accepts O'Laughlin's marriage proposal, much to Rigsby's dismay. However, it is revealed in the third season finale that Craig is actually a mole for Red John.

In season 4, Rigsby starts dating a public defender. Van Pelt is jealous when she finds out, hinting that she wants Rigsby back.

In the season 5 episode "Red Velvet Cupcakes", Rigsby and Van Pelt go undercover as a couple with relationship problems. They then start showing their true feelings towards each other; after the case was solved, Van Pelt goes over to Rigsby's home and starts kissing him, which implies that they revived their relationship. In the season 5 finale, Rigsby confirms with Cho that he and Van Pelt are back together. In the sixth season episode "Wedding in Red," Rigsby proposes to Van Pelt, who accepts; they are wed in the same episode.

In the season 6 episode "My Blue Heaven," which jumps forward two years, Rigsby and Van Pelt are still married, running a digital surveillance firm, and have a young child.

With Sarah Harrigan

Rigsby begins dating Sarah Harrigan, a public defender, in season 4. In "My Bloody Valentine", she informs Rigsby she is pregnant. In the episode "War of the Roses", he and Sarah start preparing for their impending parenthood. They attend their first Lae childbirth class. Rigsby gets a little queasy and awkward after watching videos of birth. He later proposes to Sarah in one of the CBI conference rooms, but she says she does not want him to propose to her just because she is pregnant. She also says Rigsby will be a great father, but they are not ready for marriage yet. In "Something's Rotten in Redmund," Sarah gives birth (off-camera) to their son, Benjamin. In season 5 ("Blood Feud"), Rigsby reveals he and Sarah have split.