Where can I watch “NCIS” Season 23 Episode 15 online?

This page provides episode info and a legal-only guide. It does not host streams or downloads. Check official platforms and licensed services for availability in your region (US first).

Do I need to watch earlier episodes before “Knick-Knack”?

Watching earlier episodes in season 23 helps you follow the plot and character arcs leading into this episode.

Watch NCIS Season 23 Episode 15 Online

“Knick-Knack” — Watch "NCIS" Season 23 Episode 15 online in HD for free. Check streaming providers, cast, and episode details.

Apr 7, 2026 Season 23 Episode 15 43 min M

10.0 ★ ★ ★ ★ ★

2 votes

NCIS Season 23

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Season 23 Episode 15 — Aired on Apr 7, 2026 • runs about 43 minutes.

Notable cast/guest names in this episode include Sean Murray, Wilmer Valderrama, Katrina Law, Brian Dietzen.

This page includes 1 official still(s) (when available) plus legal availability links.

Looking for “watch NCIS Season 23 Episode 15 online”? This is a legal-only guide with synopsis, stills, and navigation for this season.

Synopsis

A murder aboard a museum ship becomes a cryptic treasure hunt when a dying Navy captain leaves a final clue; to solve it, the team must decode what was worth killing -- and dying -- for.