In the episode "New Haunts", at a masquerade ball held by Governor Pamela Milton, a disgruntled former soldier, Tyler Davis, takes Pamela's secretary, Maxxine "Max" Mercer, hostage while denouncing her government. Daryl Dixon gets him to surrender but allows Sebastian to take credit for his capture.
In the episode "The Lucky Ones", Pamela takes a tour of the Coalition's settlements and is unimpressed to hear Alexandria has fallen more than once. After meeting with Oceanside, Pamela goes to Hilltop, where she tries to persuade Maggie Greene to join the Commonwealth. Maggie is suspicious of the Commonwealth and refuses to accept aid from them, to the frustration of several Hilltop residents who decide to go join the Commonwealth. Hornsby is also frustrated by Maggie's decision but insists to Aaron he will persevere, seeking to build up his power to get out from under Pamela.
In the second part finale "Acts of God", Max investigates Pamela and assembles some members of Alexandria to post an article in the newspaper about Pamela's lies.
In the third part premiere "Lockdown", Carol Peletier and Negan locate Sebastian and safely deliver him to Pamela. Desperate, Pamela strikes an uneasy deal with Carol. At the same time, the others engage in a cat and mouse game with Hornsby's soldiers, killing several before they end up in a standoff. In the episode "A New Deal", the standoff escalates when Dixon takes Hornsby hostage just as Carol, Negan, Pamela, and Mercer arrive. Sebastian is later killed by a zombie during a riot instigated by Hornsby.
In the episode "Variant", in the aftermath of the riot, Pamela publicly blames Max's boyfriend Eugene Porter for Sebastian's death. She promises to pardon Max if Mercer cooperates. When Sebastian reanimates as a zombie, a grieving Pamela has Rowan executed and orders Hornsby to feed his corpse to Sebastian as a punishment. In the episode "What's Been Lost", Pamela blackmails Yumiko Ukumora into being the prosecutor in Eugene's show trial, threatening to kill her brother Tomichi if she refuses. After learning of Daryl, Carol and Lance's escape, Yumiko reminds the Commonwealth of how invaluable Tomi is before making the stunning public announcement that Pamela is unjustly persecuting Eugene, and Yumiko will be acting as Eugene's defense attorney instead of his prosecutor.
In the episode "Faith", Eugene goes on trial, creating a great deal of unrest in the Commonwealth despite Pamela's efforts to claim that Eugene had fabricated the tape of Sebastian. In the episode "Family", Princess makes contact with Mercer, who helps the group sneak in and plans to use the testimony of the liberated prisoners to legally remove Pamela from power. However, Pamela catches onto his deception and has Mercer arrested for treason. Pamela draws the Coalition into a trap, killing Tyler and several others before they manage to escape. An enraged Pamela opens fire into the crowd, accidentally wounding Judith Grimes. In an attempt to quell the rebellion, Pamela has a massive herd of zombies led to the city to trigger a lockdown, but the herd contains a number of variant walkers and is able to overrun the Commonwealth's defenses. Pamela orders her soldiers to protect the homes of the elite, abandoning the rest of the Commonwealth in order to save herself.
In the series finale "Rest in Peace", Princess and Max break Mercer out who leads his men and the Coalition forces in confronting Pamela as she barricades herself in the Estates. With the people outside about to be devoured, Daryl gives a rousing speech that causes Pamela's men to turn on her and allow everyone inside. Mercer arrests Pamela for her crimes, but she tries to feed herself to a zombified Hornsby instead. Recognizing that prison is a worse fate than death for Pamela, Maggie puts Hornsby down and saves her. Pamela is then imprisoned for life in her own jail.
