(2 of 17)

The Flash -- "Paradox" -- Image: FLA302a_0023b.jpg -- Pictured (L-R): Tom Felton as Julian Albert and Jesse L. Martin as Detective Joe West -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(3 of 17)

The Flash -- "Paradox" -- Image: FLA302a_0115b.jpg -- Pictured (L-R): Jesse L. Martin as Detective Joe West and Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(4 of 17)

The Flash -- "Paradox" -- Image: FLA302a_0140b.jpg -- Pictured (L-R): Jesse L. Martin as Detective Joe West and Candice Patton as Iris West -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(5 of 17)

The Flash -- "Paradox" -- Image: FLA302a_0144b.jpg -- Pictured: Candice Patton as Iris West -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(6 of 17)

The Flash -- "Paradox" -- Image: FLA302a_0267b.jpg -- Pictured (L-R): Grant Gustin as The Flash and John Wesley Shipp as Jay Garrick -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(7 of 17)

The Flash -- "Paradox" -- Image: FLA302a_0333b2.jpg -- Pictured: Grant Gustin as The Flash -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(8 of 17)

The Flash -- "Paradox" -- Image: FLA302a_0358b2.jpg -- Pictured: Grant Gustin as The Flash -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(9 of 17)

The Flash -- "Paradox" -- Image: FLA302a_0425b.jpg -- Pictured: Grant Gustin as The Flash -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(10 of 17)

The Flash -- "Paradox" -- Image: FLA302b_0046b.jpg -- Pictured: Tom Felton as Julian Albert -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(11 of 17)

The Flash -- "Paradox" -- Image: FLA302b_0051b.jpg -- Pictured (L-R): Jesse L. Martin as Detective Joe West and Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(12 of 17)

The Flash -- "Paradox" -- Image: FLA302b_0155b.jpg -- Pictured: Tom Felton as Julian Albert and Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(13 of 17)

The Flash -- "Paradox" -- Image: FLA302b_0201b.jpg -- Pictured: Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(14 of 17)

The Flash -- "Paradox" -- Image: FLA302b_0244b.jpg -- Pictured: Tom Felton as Julian Albert -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(16 of 17)

The Flash -- "Paradox" -- Image: FLA302b_0274b.jpg -- Pictured: Grant Gustin as Barry Allen -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.

(17 of 17)

The Flash -- "Paradox" -- Image: FLA302b_0278b.jpg -- Pictured: Carlos Valdes as Cisco Ramon -- Photo: Dean Buscher/The CW -- © 2016 The CW Network, LLC. All rights reserved.