Watch Magnum P.I. Online: Season 4 Episode 20

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Did the gang work well with one of them undercover?

A desperate mission in a high-security correctional center on Magnum P.I. Season 4 Episode 20 left Magnum and Higgins in danger.

Having to Choose - Magnum P.I. Season 4 Episode 19

The pair tried to find out more when a ruthless criminal abducted Katsumoto's ex-wife, Beth.

Elsewhere, T.C. rushed to help Rick when Suzy had unexpected pregnancy complications.

Use the video above to watch Magnum P.I. online right here via TV Fanatic.

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Magnum P.I. Season 4 Episode 20 Quotes

Magnum: I know what it looked like between me and Lia. But nothing happened.
Higgins: You're an adult. You don't have to explain yourself to me.

Magnum: Do you want to talk privately?
Higgins: No, it's fine. It's not important. We can talk later.