Back in 1990, Tom Clancy’s Jack Ryan leapt to the movie screen via The Hunt For Red October. That launched a series of films that spanned 24 years, five movies and four lead actors.

A fifth star took over for the role’s shift to TV in 2018. John Krasinski became the title character for the Jack Ryan series.

Where Ryan goes in the future remains to be seen, but Season Four turns into the last chapter of this TV franchise. This two-Blu-ray set includes all six of S4’s episodes, and the synopses come from IMDB.

Triage: “Given the task of cleaning up the CIA, Jack makes difficult decisions that have immediate consequences. A cartel operator moves in the shadows to organize an important meeting.”

I thought both Season One and Season Two of Ryan seemed moderately enjoyable but not great. The first half of Season Three also felt mediocre, but the final segment fared much better.

I hoped S4 would pick up where S3 left off and start with a bang. It doesn’t, but that doesn’t mean the episode sputters.

Although S4 connects to prior character elements, it comes with a new narrative, and that means it needs to start from semi-scratch. We need to meet new characters and circumstances that S4 will follow.

In that regard, “Triage” proves effective enough, as it gives us the basics we need to launch the season. The presence of the always-solid Michael Peña adds a potential boost as well.

Convergence: “Jack digs deeper into former CIA Director Thomas Miller's (John Schwab) dirty operations and learns more about Domingo Chavez (Peña). Back in Myanmar, Chao Fah Sein (Louis Ozawa) must navigate the tension in the compound to keep his family safe.”

Like “Triage”, much of “Convergence” falls into the expository category. However, it explores these threads in an intriguing way that pushes S4’s plot ahead in a compelling manner.

Sacrifices: “Jack's team heads to Mexico to get answers. Acting CIA Director Elizabeth Wright (Betty Gabriel) attempts to smooth things over in Nigeria, hoping to find some resolution of her own.”

After two pretty solid shows, “Sacrifices” feels a bit more ordinary. While it moves along events in a competent manner, it lacks the pizzazz of the first two programs. Still, it does enough to keep us interested.

Bethesda: “Jack, Chavez, and CIA field officer Mike November (Michael Kelly) pursue their Croatia lead to an unsettling affair. Chao takes a mandatory trip to Geneva to speak with his boss. Acting Assistant CIA Director James Greer (Wendell Pierce) works on connecting the two shell companies.”

Ryan bounces back after the slightly sluggish “Sacrifices” with a pretty solid launch to S4’s second half. We get a sly push ahead with this involving program.

Wukong: “Complications arise in Jack's plan to extract Chao and his family from the compound in Myanmar. Back in DC, Greer comes to a shocking conclusion.”

On one hand, I like the combination of Jack, Chavez and November, as that grouping gives S4 spark – and needed humor. On the negative side, Jack’s girlfriend Cathy (Abbie Cornish) finds herself down a predictable path, one that seems awfully trite.

The good still outweighs the bad here. However, I can’t claim to feel wild that S4 chose to use Cathy as such a worn-out plot device.

Proof of Concept: “If Wright wants to get Jack out alive, compromises must be made. Groundbreaking intel gives the CIA a chance to prevent a domestic terrorist act.”

S4 – and the entire series – concludes here. On the positive side, the stale Cathy plot resolved in “Wukong”, so we don’t wind up stuck with it here.

However, “Proof” swaps out Jack as the character in distress, a choice that also doesn’t seem especially creative. Nor does the ticking clock related to the need to find bombs, a story point that feels overused in general – and in particular with this franchise.

None of this means “Proof” turns into a bad episode or that S4 becomes a weak collection of shows. Nonetheless, after a solid start, S4 veers more predictable and less inspiring. This means an enjoyable but less than dazzling series concludes on an enjoyable but less than dazzling note.

Jack Ryan appears in an aspect ratio of approximately 2.00:1 on these Blu-ray Discs. The episodes didn’t dazzle but they represented the source accurately.

This meant pretty solid sharpness. Occasional signs of minor softness emerged, but these remained minor and not a problem.

No issues with jagged edges or moiré effects materialized, and I saw no edge haloes. Source flaws failed to become an issue.

Much of S4 opted for a dingy sense of green, blue and amber – hey, at least it deviated a bit from Hollywood Orange and Teal! Well, mainly, as some examples of orange and teal manifested, but not on a frequent basis. Though the tones lacked oomph, they demonstrated the appropriate qualities given the design choices.

Blacks seemed dense and firm, while shadows offered appealing clarity. The shows boasted nice visuals.

As for the series’ Dolby Atmos soundtracks, these added involvement to the proceedings. Downconverted to Dolby TrueHD 7.1, the channels used music in an involving manner, and various effects also broadened the soundscape in a winning way.

While not a series packed with action, Ryan came to life enough to work the speakers well. Various vehicles and elements of warfare moved around the room in a convincing pattern to contribute real life to the tale.

Audio quality worked well. Speech seemed concise and distinctive, while effects appeared accurate and natural. Louder moments – such as from various weapons – boasted fine punch.

Music was warm and full, with a good level of punch from percussive elements. All of this left us with a satisfactory “B+” soundtrack.

Four Deleted Scenes fill a total of four minutes, eight seconds. We find segments for “Convergence” (one scene, 0:35), “Wukong” (1, 2:02), and “Proof of Concept (2, 1:31).

Don’t expect much substance from these clips, as they tend to offer minor exposition most of the time. A moment between Greer and his family offers a bit of sentiment but nothing else stands out as vaguely memorable.

After four seasons, Jack Ryan comes to an end with a moderately enjoyable collection of shows. Nothing here dazzles – or really lives up to the franchise’s potential – but we get a reasonably engaging package of programs. The Blu-rays offer very good picture and audio but they skimp on supplements. Expect a fairly enjoyable season from the series finale.