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Watch Castle Season 6 Episode 20 online to see Rick and Kate go all 1970s on us.

Looking to watch Castle Season 6 Episode 20 online? TV Fanatic is your destination for every paid and free streaming option of the Castle S6E20 full episode from 2 affiliates.

Rating: 3.9 / 5.0 (135 Votes)

Watch Castle Season 6 Episode 20 online to see what Castle and company would have looked like in the 1970s.

Episode Details

Castle Season 6 Episode 20: "That '70s Show"

When the body of an infamous mobster who disappeared in the 1970s is found, Castle and Beckett find one remaining witness. But since he still believes it's the '70s, they must act like his delusion is real in order to find their killer.

Castle Season 6 Episode 20 Quotes

Harold: Have you ever seen a cop with an ass that fine. If this women's lib I'm all for it.
Castle: To be fair, you do have a very fine, never mind.

A testament to the truly indestructible nature of polyester.


Castle Season 6 Episode 20 Music

  Song Artist
Donna-summer-last-dance Last Dance Donna Summer iTunes
Walter-murphy-a-fifth-of-beethoven A Fifth of Beethoven Walter Murphy iTunes
Silver-convention-get-up-and-boogie-thats-right Get Up And Boogie (That'S Right) Silver Convention iTunes
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