Eu presumo que você esteja falando sobre o episódio " Sozinho " .
Se você assistiu apenas ao começo, as coisas parecerão um pouco estranhas e fora do lugar. Porque o episódio em questão é aberto com um flashback .
Veja aqui uma parte de um recapitulação :
The episode began with a flashback montage of Bob on his own walking through the woods and looking defeated. He runs into Daryl and Glenn, who give him the Rick-approved line of questioning about his apocalypse life.
De outro resumo do episódio :
BOB FLASHBACK
Origin story! Sort of. The start of one, anyway. Bob even gets a cool song as he’s wandering slowly through the forest.
[...]
He hears Daryl's chopper coming down the road to the rescue. So this is right as Daryl finds him, about a week before the start of Season 4. Can you imagine Daryl literally riding in to rescue you? It’s Daryl and Glenn who come by him.
Ainda outro revisor aborda:
The cold open kicks off with a glimpse at pre-Prison Bob Stookey. A haunted, tortured soul with a shady past, Bob has been an enigma for most of this season. Here, he's scruffier than we're used to seeing him, armed with a machete and his signature canvas/leather backpack.
[...]
That is until a pickup truck and motorcycle appear on the road. Glenn and Daryl approach Bob, weapons at the ready.
Após este flashback, a cena muda de volta para o presente com Bob, Maggie e Sasha lutando contra um grupo de zumbis (o que mais).