The 13th season of Blue Bloods has already delivered a shocking twist after series mainstay Jamie Reagan (played by Will Estes) was shot in the season premiere last week on CBS. Thankfully, the devoted officer made it out of the altercation alive, and he already seems to be making a full recovery heading into this week's episode.

Jamie appears to have completely recovered from his stint in the hospital at the beginning of Blue Bloods season 13.

In the season opener, the sergeant takes a bullet under his vest after protecting his brother Danny (Donnie Wahlberg) during a domestic violence case.

His family rushed to his aid, and he even had to use a wheelchair to leave the hospital at the end of the episode.

Jamie's condition after the shooting left some fans speculating he could be permanently paralysed, or at least have to spend much of the new season working on his recovery.

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Further images taken from behind-the-scenes have also confirmed Jamie is still at full health throughout the new season.

Snaps were taken during filming feature actors Will, Donnie and Bridget Moynahan, who portrays their sister Erin.

They appear to be doing work on a classic car, and Jamie once again doesn't appear to be having trouble keeping his feet on solid ground.

There was also no indication Jamie was still struggling at the Reagans' family dinner at the end of the episode.

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Family patriarch Frank Reagan (Tom Selleck) looked at Jamie while they said grace, suggesting he may still be harbouring concerns over his son's condition.

Thankfully, Frank doesn't have any immediate cause for alarm as his son will be fighting fit and even taking on a demanding new position within the NYPD when Blue Bloods continues on Friday.

Even so, just because Jamie is back in action doesn't mean there won't be more challenges coming his way over the coming weeks.

The synopsis for the second episode reads: "Frank announces he will not endorse Erin's run for district attorney.