The Rest of Their Lives…
Sydney Carton
He walked towards her and paused. Gazing out into the distance: ladies knitting with an empty chair next to them, a pale face staring out of a window, torn with grief, relief, and gratitude, hundreds of faces, staring up with expectation. He took another step, then continued. He saw the block, stepped into it, and has no more memories since this point.
Er, well, Sydney is very much dead at this point. So no epilogue for him, poor thing. Had he lived, he should have married the little seamstress.
Lucy Darnay
She watched Carton, pretending to be her beloved husband. Torn with grief and gratitude, she gratefully watched this selfless man sacrifice himself for her happiness. As she watched she suddenly felt faint. As she collapsed onto the pavement, all you could hear was her call of her true love for Carton. Darnay sat there and laughed.
Immediately upon arriving back in England, Lucie realized that all along her true love had been Sydney. This broke her heart to such a degree that when she caught a fever the next week she had no will to live and died, thusly dying young as she always thought that she would and joining her beloved Carton in heaven. Only he didn't love her anymore, because he had the wonderful little seamstress. So Lucie just hung out with her mom and her son.
Charles Darnay
As he laughed at his wife, falling down and dying; Charles Darnay felt compelled to immediately remarry. However, he was not very brilliant and when he remarried he chose to marry Miss Pross. The largest problem with Miss Pross is that she was already a proven mass murderer. While she did not attempt to kill Charles Darnay, she killed him with guilt. He saw how she killed Mme Defarge and decided that Mme Defarge should have been his true wife, so he just stopped breathing. He held his breath until he lost consciousness at which point he threw himself out the window.
Charles raised lil' Lucie goosey as best he could without his darling wife. Sadly he went mad after awhile as a delayed effect of his imprisonment, effectively orphaning Lucie. He died five years later.
Little Lucie
Little Lucie liked to play with all her mommy's stuff after her mommy died. Then she realized that Miss Pross was a mass murderer. So she went and hid in a corner. And never came out again.
Lucie was raised by Miss Pross, sort of. The poor old woman did the best she could but she was deaf and had trouble attending to a little girl's needs. Lucie married Jerry Cruncher's son at the age of eighteen. And was happy ever after. Because the fact that her mother was a stupid twit and her father not much brighter wasn't her fault.
Stryver
Stryver celebrated his victory as everyone was happy, except for Carton who was a life failure anyway. He got so drunk that he wandered out of the bar and fell onto Miss Pross who stabbed him because she was also drunk and she thought he was the bar lady.
Stryver wanted little Lucie to marry one of his sons. She didn't. he was sad. Then Miss Pross killed him. With, in a cruel twist of irony, knitting needles.
Miss Pross
Miss Pross turned into a mass murderer after her first accidental murder of Mme Defarge. However, she herself is caught by the authorities and she is celebrated as a national hero. However when they set off fireworks to celebrate her crimes, they blinded her, Then the town decided that since she was now a vegetable they might as well eat her for their feast.
ditto