NCIS - Los Angeles Database
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Episode   Credits   Transcript    

LD50 is the fourteenth episode of NCIS: Los Angeles Season One.

Synopsis[]

The body of a career criminal posing as a Marine is discovered, prompting OSP to investigate. They soon discover that a biochemical weapons expert suffering from Alzheimer's disease was tricked into producing a deadly toxin for an arms dealer. The team soon realize that there will be an auction at which the weapon will be sold and race against the clock to stop international terrorists from buying the weapon which could be used to launch a bio-terror attack against Los Angeles.

Cast[]

Main Characters[]

Name Portrayed by Occupation
G. Callen Chris O'Donnell Special Agent-in-Charge, NCIS:OSP
Kensi Blye Daniela Ruah Special Agent, NCIS:OSP
Sam Hanna LL Cool J Special Agent, NCIS:OSP
Henrietta Lange Linda Hunt Operations Manager, NCIS:OSP
Nate Getz Peter Cambor Operational Psychologist, NCIS:OSP
Eric Beale Barrett Foa Tech Operator, NCIS:OSP

Guest Characters[]

Name Portrayed by Notes
Dallas JR Bourne Head of the local crime syndicate
Esther Balmore Julianna McCarthy Former expert on the development of toxins, now suffering from Alzheimer's.
Gage Jenson Dameon Clarke
Simon Amputuan Burt Bulos Filipino arms dealer detained by NCIS
Jacobus Troyger Andrew Connolly Arms dealer responsible for the auction at which the Clostridium botulinum was sold.
Sadiki Hassan Vachik Mangassarian Egyptian arms dealer present at the auction.
Blond Man Bru Muller
Security Guard Nicholas Givanio Uncredited

Detailed Summary[]

Major Events[]

Trivia[]

  • The episode name "LD50" refers to the deadly substance around which the episode revolves.
  • Lethal Dose, 50% or LD 50 is one the measures used to indicate the dose of radiation or of a toxic substance required to kill half the members of a tested population. Other measures used to indicate the dosage include LC50 (Lethal Concentration, 50%) or LCt50 (Lethal Concentration & Time).
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