(1 of 15)

The Flash -- "Trajectory" -- Image FLA216a_0007b -- Pictured (L-R): Tom Cavanagh as Harrison Wells and Violett Beane as Jesse -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(2 of 15)

The Flash -- "Trajectory" -- Image FLA216a_0117b -- Pictured: Grant Gustin as Barry Allen / The Flash -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(3 of 15)

The Flash -- "Trajectory" -- Image FLA216a_0130b -- Pictured: Grant Gustin as Barry Allen / The Flash -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(4 of 15)

The Flash -- "Trajectory" -- Image FLA216b_0007b -- Pictured: Tom Cavanagh as Harrison Wells -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(5 of 15)

The Flash -- "Trajectory" -- Image FLA216b_0025b -- Pictured (L-R): Violett Beane as Jesse and Tom Cavanagh as Harrison Wells -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(6 of 15)

The Flash -- "Trajectory" -- Image FLA216b_0041b -- Pictured (L-R): Carlos Valdes as Cisco Ramon, Allison Paige as Trajectory, Violett Beane as Jesse, Tom Cavanagh as Harrison Wells, and Danielle Panabaker as Caitlin Snow -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(7 of 15)

The Flash -- "Trajectory" -- Image FLA216b_0046b -- Pictured (L-R): Violett Beane as Jesse and Allison Paige as Trajectory -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(8 of 15)

The Flash -- "Trajectory" -- Image FLA216b_0047b -- Pictured (L-R): Tom Cavanagh as Harrison Wells, Allison Paige as Trajectory, and Violett Beane as Jesse -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(9 of 15)

The Flash -- "Trajectory" -- Image FLA216b_0060b -- Pictured (L-R): Allison Paige as Trajectory and Tom Cavanagh as Harrison Wells -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(10 of 15)

The Flash -- "Trajectory" -- Image FLA216b_0079b -- Pictured: Danielle Panabaker as Caitlin Snow -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(11 of 15)

The Flash -- "Trajectory" -- Image FLA216b_0103b -- Pictured (L-R): Danielle Panabaker as Caitlin Snow and Carlos Valdes as Cisco Ramon -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(13 of 15)

The Flash -- "Trajectory" -- Image FLA216b_0172b -- Pictured: Allison Paige as Trajectory -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(14 of 15)

The Flash -- "Trajectory" -- Image FLA216b_0275b -- Pictured: Grant Gustin as Barry Allen / The Flash -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(15 of 15)

The Flash -- "Trajectory" -- Image FLA216c_0022b -- Pictured: Grant Gustin as Barry Allen / The Flash -- Photo: Katie Yu/The CW -- © 2016 The CW Network, LLC. All rights reserved.