Character Relationship Map: Breaking Point

Characters

• Michael McBain (played by Bo Svenson) — protagonist

  Former Marine and Judo instructor who witnesses a murder, testifies against the culprits, enters witness protection in Toronto, and ultimately returns to Philadelphia to kill mob boss Vincent Karbone...

• Frank Sirrianni (played by Robert Culp) — protagonist

  A Lieutenant who persuades Michael McBain to testify against the murderers, believing it will lead to the arrest of mob boss Vincent Karbone.

• Vincent Karbone (played by John Colicos) — supporting

  A Philadelphia construction magnate and suspected Mafia leader. He plans to kill McBain and his family for testifying and is ultimately neutralized by McBain.

• Diana McBain (played by Belinda Montgomery) — supporting

  McBain's sister. Her fiancé is murdered, which serves as a catalyst for McBain to return to Philadelphia and confront Karbone.

• Helen McBain (played by Linda Sorensen) — supporting

  A member of McBain's family who is relocated to Toronto under the newly introduced witness protection program after the threats against them are revealed.

• Ted Buchanan (played by Alan McRae) — minor

Canonical Relationships

Family, romantic, and professional connections based on plot evidence.

• Michael McBain → Helen McBain (Family Member) — Helen shares the family's relocation after Karbone's threats put them in danger.

  Helen McBain is described as a member of Michael McBain's family, and she is relocated with the family to Toronto under witness protection.

• Michael McBain → Frank Sirrianni (Professional Witness And Persuading Investigator) — Sirrianni's persuasion leads McBain to testify despite intimidation, setting the later threat against McBain's family in motion.

  Frank Sirrianni persuades Michael McBain to identify the murderers and testify, believing the trial may lead to Vincent Karbone.

• Diana McBain → Ted Buchanan (Romantic Fiancée And Fiancé) — Ted's murder devastates Diana's circumstances and triggers Michael's return to Philadelphia.

  The plot identifies Ted Buchanan as Diana McBain's fiancé and says he is murdered.

• Michael McBain → Diana McBain (Family Brother And Sister) — Diana's loss becomes the immediate catalyst for Michael's return and confrontation with Karbone.

  Diana is identified as Michael McBain's sister, and news of her fiancé Ted Buchanan's murder prompts Michael to return to Philadelphia.

Story Dynamics

Alliances, conflicts, and narrative interactions that evolve throughout the story.

• Michael McBain → Vincent Karbone (Conflict Target And Threatened Mob Leader) — Their conflict escalates from Karbone's plan to silence McBain to McBain's final confrontation with and killing of Karbone.

  Karbone plans to kill McBain and his family after McBain testifies. McBain later returns to Philadelphia and kills Karbone.

Story Analysis

After witnessing a murder, Michael McBain's testimony brings danger to his family and drives him toward a final confrontation with Vincent Karbone.

Plot Progression

1. A Witness Steps Forward — Michael McBain witnesses a murder and is initially reluctant to identify the culprits. Frank Sirriani persuades him to testify, hoping the case will lead to Vincent Karbone.
2. Testimony and a Failed Lead — McBain testifies despite intimidation. The defendants refuse to name Karbone and reject a plea bargain, disappointing Sirriani's expectation that the trial could expose him.
3. A Family Under Threat — McBain and his family try to resume ordinary life, but Karbone plans to kill them. The family enters witness protection and is moved to Toronto.
4. The Return to Philadelphia — The family's new identity is compromised, and McBain learns that Diana's fiancé Ted Buchanan has been murdered. He returns to Philadelphia to confront Karbone.
5. The Threat Neutralized — McBain kills Karbone. With Karbone neutralized, the immediate threat to McBain's family is ended.