Supergirl -- "Trinity" -- Image Number: SPG317a_0089.jpg -- Pictured: Jeremy Jordan as Winn -- Photo: Katie Yu/The CW -- © 2018 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Trinity" -- Image Number: SPG317a_0116.jpg -- Pictured: David Harewood as Hank/J'onn -- Photo: Katie Yu/The CW -- © 2018 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Trinity" -- Image Number: SPG317a_0132.jpg -- Pictured (L-R): Katie McGrath as Lena Luthor, Chyler Leigh as Alex, Jeremy Jordan as Winn, David Harewood as Hank/J'onn and Melissa Benoist as Kara/Supergirl -- Photo: Katie Yu/The CW -- © 2018 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Trinity" -- Image Number: SPG317a_0194.jpg -- Pictured (L-R): Jeremy Jordan as Winn and Melissa Benoist as Kara/Supergirl -- Photo: Katie Yu/The CW -- © 2018 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Trinity" -- Image Number: SPG317a_0219.jpg -- Pictured: Katie McGrath as Lena Luthor -- Photo: Katie Yu/The CW -- © 2018 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Trinity" -- Image Number: SPG317b_0013.jpg -- Pictured: Chyler Leigh as Alex -- Photo: Jack Rowand/The CW -- © 2018 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Trinity" -- Image Number: SPG317b_0024.jpg -- Pictured (L-R): Katie McGrath as Lena Luthor, Chyler Leigh as Alex and Melissa Benoist as Kara/Supergirl -- Photo: Jack Rowand/The CW -- © 2018 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Trinity" -- Image Number: SPG317b_0083.jpg -- Pictured (L-R): Chyler Leigh as Alex and Jesse Rath as Brainiac-5 -- Photo: Jack Rowand/The CW -- © 2018 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Trinity" -- Image Number: SPG317b_.jpg -- Pictured (L-R): Chris Wood as Mon-El and Amy Jackson as Imra Ardeen/Saturn Girl -- Photo: Jack Rowand/The CW -- © 2018 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Trinity" -- Image Number: SPG317b_0154.jpg -- Pictured: Amy Jackson as Imra Ardeen/Saturn Girl -- Photo: Jack Rowand/The CW -- © 2018 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Trinity" -- Image Number: SPG317b_0224.jpg -- Pictured: Mehcad Brooks as James Olsen/Guardian -- Photo: Jack Rowand/The CW -- © 2018 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Trinity" -- Image Number: SPG317c_0001.jpg -- Pictured: Chyler Leigh as Alex -- Photo: Jack Rowand/The CW -- © 2018 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Trinity" -- Image Number: SPG317b_0263.jpg -- Pictured (L-R): Chris Wood as Mon-El and Amy Jacksin as Imra Ardeen/Saturn Girl -- Photo: Jack Rowand/The CW -- © 2018 The CW Network, LLC. All Rights Reserved.

Supergirl -- "Shelter From the Storm" -- Image Number: SPG318a_0017.jpg -- Pictured (L-R): Melissa Benoist as Kata/Supergirl and David Harewood as Hank/J'onn -- Photo: Bettina Strauss/The CW -- © 2018 The CW Network, LLC. All rights reserved.

Supergirl -- "Shelter From the Storm" -- Image Number: SPG318a_0075.jpg -- Pictured (L-R): David Harewood as Hank/J'onn and Betty Buckley as Patricia Arias -- Photo: Bettina Strauss/The CW -- © 2018 The CW Network, LLC. All rights reserved.

Supergirl -- "Shelter From the Storm" -- Image Number: SPG318a_0099.jpg -- Pictured: Betty Buckley as Patricia Arias -- Photo: Bettina Strauss/The CW -- © 2018 The CW Network, LLC. All rights reserved.

Supergirl -- "Shelter From the Storm" -- Image Number: SPG318a_0110.jpg -- Pictured: Betty Buckley as Patricia Arias -- Photo: Bettina Strauss/The CW -- © 2018 The CW Network, LLC. All rights reserved.

Supergirl -- "Shelter From the Storm" -- Image Number: SPG318a_0213.jpg -- Pictured (L-R): Betty Buckley as Patricia Arias and Melissa Benoist as Kara/Supergirl -- Photo: Bettina Strauss/The CW -- © 2018 The CW Network, LLC. All rights reserved.

Supergirl -- "Shelter From the Storm" -- Image Number: SPG318a_0234.jpg -- Pictured (L-R): Betty Buckley as Patricia Arias and Melissa Benoist as Kara/Supergirl -- Photo: Bettina Strauss/The CW -- © 2018 The CW Network, LLC. All rights reserved.

Supergirl -- "Shelter From the Storm" -- Image Number: SPG318a_0259.jpg -- Pictured: Odette Annable as Samantha Arias/Reign -- Photo: Bettina Strauss/The CW -- © 2018 The CW Network, LLC. All rights reserved.

Supergirl -- "Shelter From the Storm" -- Image Number: SPG318a_0005.jpg -- Pictured: Chyler Leigh as Alex -- Photo: Bettina Strauss/The CW -- © 2018 The CW Network, LLC. All rights reserved.

Supergirl -- "Shelter From the Storm" -- Image Number: SPG318b_0032.jpg -- Pictured: Emma Tremblay as Ruby Arias -- Photo: Bettina Strauss/The CW -- © 2018 The CW Network, LLC. All rights reserved.

Supergirl -- "Shelter From the Storm" -- Image Number: SPG318b_0042.jpg -- Pictured: Chyler Leigh as Alex -- Photo: Bettina Strauss/The CW -- © 2018 The CW Network, LLC. All rights reserved.

Supergirl -- "Shelter From the Storm" -- Image Number: SPG318b_0047.jpg -- Pictured: Emma Tremblay as Ruby Arias -- Photo: Bettina Strauss/The CW -- © 2018 The CW Network, LLC. All rights reserved.

Supergirl -- "Shelter From the Storm" -- Image Number: SPG318b_0100.jpg -- Pictured (L-R): Chyler Leigh as Alex and Odette Annable as Samantha Arias/Reign -- Photo: Bettina Strauss/The CW -- © 2018 The CW Network, LLC. All rights reserved.

Supergirl -- "Shelter From the Storm" -- Image Number: SPG318b_0106.jpg -- Pictured: Odette Annable as Samantha Arias/Reign -- Photo: Bettina Strauss/The CW -- © 2018 The CW Network, LLC. All rights reserved.

Supergirl -- "Shelter From the Storm" -- Image Number: SPG318b_0137.jpg -- Pictured: Chris Wood as Mon-El -- Photo: Bettina Strauss/The CW -- © 2018 The CW Network, LLC. All rights reserved.

Supergirl -- "Shelter From the Storm" -- Image Number: SPG318b_0149.jpg -- Pictured (L-R): Melissa Benoist as Kara/Supergirl and Chris Wood as Mon-El -- Photo: Bettina Strauss/The CW -- © 2018 The CW Network, LLC. All rights reserved.

Supergirl -- "Shelter From the Storm" -- Image Number: SPG318b_0185.jpg -- Pictured (L-R): Odette Annable as Samantha Arias/Reign and Melissa Benoist as Kara/Supergirl -- Photo: Bettina Strauss/The CW -- © 2018 The CW Network, LLC. All rights reserved.

Supergirl -- "Shelter From the Storm" -- Image Number: SPG318b_0197.jpg -- Pictured (L-R): Chyler Leigh as Alex and Emma Tremblay as Ruby Arias -- Photo: Bettina Strauss/The CW -- © 2018 The CW Network, LLC. All rights reserved.