As I believe I may have mentioned, I have a love-hate relationship with David Tennant’s onscreen performances.  I find him inexplicably, positively grating whenever he plays a protagonist.  (See 2011’s “Fright Might” remake, or his cringe-inducing stint as “Doctor Who.”)  But it seems to me that the man is absolutely fantastic when he plays a bad guy.  (See his frightening and hilarious role as Kilgrave the first season of “Jessica Jones” in 2015.)

“Bad Samaritan” (2018) thankfully presents us with the latter Tennant.  He musters an intensity with his eyes and his voice that are incongruous counterpoints to his innocent-looking face, and this makes him a damned good antagonist in a thriller.  (He is a highly organized, sociopathic kidnapper in this film.  I don’t think that’s much of a spoiler, as all of the film’s marketing make it clear.)  He’s a hell of a lot of fun to watch — and listen to.

With that said, “Bad Samaritan” is an average movie — not altogether bad, but not awesomely good, either.  (I suppose I’d rate it a 7 out of 10.)  It benefits a lot from another very good actor in Robert Sheehan as its anti-heroic young protagonist.  (The plot setup here is interesting — a mild-mannered burglar discovers a psychopath’s captive while in his house, then struggles with how he can help the terrified victim of a far worse criminal than he is.)  The movie’s biggest sin seems to be that it borrows heavily from comparable genre-defining works from the likes of Thomas Harris and James Patterson.  But it’s still an enjoyable enough movie in its own right.

There’s someone else here that’s great fun to watch too — Kerry Condon as the kidnapee.  Her voice is amazing, and she’s a superb actress; I think she’s strong enough to carry another movie like this.  I just knew she looked familiar … it turns out she played Clara, the really weird woman that Rick found in the woods during Season 3 of “The Walking Dead.”  (He asks her the show’s signature “three questions.”)

She is also to voice of F.R.I.D.A.Y., Tony Stark’s on-board A.I. in several of Marvel’s “Avengers” movies.  Didn’t see that one coming.  Weird world.