After a thrilling 2-2 draw at the Valley 11 days ago, these two will meet in a replay at Edgeley Park.
Stockport led after just three minutes in South London, Chris Hussey on target, but an own goal by Joe Lewis, followed by Albie Morgan’s deft dink, had Charlton on course for victory.
However, in the 97th minute, Myles Hippolyte flicked home a corner at the near-post, sending the away end wild and forcing this rematch.
Charlton came into this tie as favourites, not just because they had home advantage, but they’re from the division above.
The Addicks hammered Coalville Town in round one, but will now need to win on the road to reach round three for a second successive season.
Stockport’s only appearance in the third round since 2006/07 came in the lockdown season, doing so as a non-league club, eventually ousted 1-0 by West Ham.
The Hatters hammered Swindon Town in round one, so will be confident of another home win here.
Who will have a third round home tie against Walsall to look forward to?