S3·E17 Trinity
- Episode
- Season 3, Episode 17
- Air Date
- May 7, 2018
- Runtime
- 42 minutes
- Directors
- Erica Weiss, Caitlin Parrish
- Writers
- Derek Simon, Caitlin Parrish
- Score
- 7.1/10 (21 TMDB votes)
- Story Type
- Core Character Arc
Narrative Classification: Character-defining development exploring origin backstory and emotional depth.
Synopsis
Still reeling after learning about Lena’s secret, Supergirl asks Guardian for a favor that could alter his relationship with Lena forever. Meanwhile, with all three Worldkillers united, Supergirl and the team brace for an epic battle.
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Director & writers
Guest stars
Frequently Asked Questions
When did Season 3 Episode 17 of Supergirl air?
Season 3, Episode 17 ('Trinity') originally aired on May 7, 2018.
How long is Season 3 Episode 17 ('Trinity')?
The runtime for this episode is approximately 42 minutes.
What happens in Supergirl Season 3 Episode 17?
Still reeling after learning about Lena’s secret, Supergirl asks Guardian for a favor that could alter his relationship with Lena forever. Meanwhile, with all three Worldkillers united, Supergirl and the team brace for an epic battle....
All Supergirl episode ratings Season 3 Where to watch
Top-rated Supergirl episodes
- S3E6 · Midvale ★ 7.9
- S2E15 · Exodus ★ 7.5
- S2E3 · Welcome to Earth ★ 7.4
- S2E1 · The Adventures of Supergirl ★ 7.4
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