Pembleton (
Andre Braugher) and
Bayliss (
Kyle Secor) investigate the murder of Angela Frandina, who was found strangled in her bed clutching a note reading, "Ed did it", although it proves to be a false lead. Their investigation leads the detectives to discover Angela had several strange boyfriends and worked for both an
S&M fashion store and a
phone sex hotline. Bayliss claims to be disgusted by sexual taboos, but Pembleton insists everybody has a darker side and that until Bayliss recognizes his own, his virtues can never truly be tested. Pembleton and Bayliss return to the store and ask about leather belts with bead patterns matching the marks on Angela's neck. Store owner Tanya (
Adrienne Shelly) tells them Angela's neighbor Jeremy (Scott Nielson) has a jacket with a matching belt. Under interrogation, Jeremy confesses to choking and accidentally killing Angela with the belt during violent (but consensual) sex. As a thank you for solving the murder, Tanya brings Bayliss a leather jacket as gift, which he reluctantly accepts. That night, he visits
Baltimore's
red light district wearing the jacket, as a way to test himself as Pembleton suggested. He is approached by a
prostitute but rejects her, thus passing the test.
Lewis (
Clark Johnson) and
Crosetti (
Jon Polito) investigate the fatal shooting of a man, who was apparently killed for a $1.49 pen. Lewis believes there must be more to the story, refusing to believe a pen is worth killing for. When they search suspect Mitchell Forman's (Sal S. Koussa) apartment, they find thousands of pens, many of which line the walls like bizarre decorations. Lewis later finds Forman at the police station, where he originally planned to turn himself in, but instead went up to the roof to commit
suicide. Lewis lures Forman away from the ledge by enticing him with a beautiful golden pen, which belonged to Lewis' deceased grandmother. Forman is taken into custody. Later, Lewis still cannot believe someone would kill over a pen, but
Gee (
Yaphet Kotto) suggests it is no worse than killing over a car or woman. Lewis, determined not to develop such a strong attachment to a material item, gives his grandmother's pen to
Felton (
Daniel Baldwin). Meanwhile, although
Munch (
Richard Belzer) is cynical and despairing over his recent breakup, the normally-grumpy
Bolander (
Ned Beatty) is unusually cheerful due to his romantic relationship with Linda (
Julianne Margulies), a much younger 26-year-old waitress. Nervous about his first real date with her, Bolander asks
Howard (
Melissa Leo) to go on a double-date with him along with Howard's boyfriend, prosecuting attorney
Ed Danvers (
Željko Ivanek). The double -ate goes well until a lonely Munch crashes, joins the table and ruins the mood by complaining about his romantic woes. Bolander, Munch and Linda leave together and walk to
Fort McHenry, where Linda offers Munch words of encouragement. Impressed with her, Munch leaves Linda and Bolander alone, where they happily watch a fireworks show. ==Production==