Would one damage be also assested to the action token if you roll double sixs on an Incap? I know it used to but don't know about now.

yes, a critical hit always increases the damage dealt in any type of attack except "No Damage" (ie, mind control) attacks.

INCAPACITATE Give this character a close combat or ranged combat action; its damage value becomes 0 until the action has been resolved. If the attack succeeds, give the target an action token.

0 DAMAGE
Damage from an attack that deals 0 damage can be modified. It can deal damage to the target as a result of a critical hit or to the attacker as a result of a critical miss. If the damage is not modified, the target is not damaged.

If you roll a 12 (two 6s) on an attack roll, you automatically hit the target, regardless of what you needed to roll to hit. This is called a critical hit. A critical hit increases by 1 damage dealt to all successfully hit targets.

P_I is quoting outdated Incap text, but he answer is still correct.

The current wording says the damage value is locked at 0.

A crit hit increases damage DEALT, so the locked VALUE is insignificant here.

Blackest night is already outdated? argh

the rules are just like technology, when it hits the market it is now outdated.

hahaha nice