When both sides realize the situation, Sullivan and Costigan each attempt to discover the other's identity before they are found out.
When both sides [M]realize the situation[/M], Sullivan and [M]Costigan[/M] each attempt to discover the other's identity before they are found out.[SEP]When both sides [M]realize the situation, Sullivan[/M] and Costigan each attempt to discover the other's identity before they are found out.[SEP]When [M]both sides realize the situation[/M], Sullivan and Costigan each attempt to discover the other's identity before they are found out.[SEP]When both sides realize the situation, Sullivan and [M]Costigan[/M] each [M]attempt to discover the other's identity before they are found out[/M].[SEP]When both sides realize the situation, [M]Sullivan[/M] and Costigan each [M]attempt to discover the other's identity before they are found out[/M].