New "The Flash" Teaser Introduces Captain Cold's Dad

Michael Ironside makes his Arrowverse debut in this teaser for next week's episode of "The Flash." Ironside joins the series as Lewis Snart, the father of Leonard Snart, aka Captain Cold (Wentworth Miller).

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Dubbed Colonel Cold by Cisco, the elder Snart's appearance in Central City sparks concern in Barry Allen that Leonard may renege on his promise not to kill anyone when committing crimes.

"Family of Rogues" arrives on The CW, Tuesday, Oct. 20 at 8 p.m.

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