Lucas Harker was the son of Jonathan and Renee Harker. He had a condition that required hourly medicines, and Jonathan forgot to give him his med's one day, resulting in his son's unfortunate, and untimely, death.

Jonathan Harker
Portal Harker
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Portrayed by William Fichtner
Centric-Episodes:   "...And Justice for All" · "Broken Mirror"
Flashback characters: Charlie Hume · Desmond Hume · Renee Harker · Lucas Harker · Sheryl Yaxley · Judge Foran · Gideon Wilds · Eames · Gavin · Stone
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