“The Debt Collector” (*** out of four) was a solidly done B-movie action melodrama about a martial-arts teacher (Scott Adkins) who falls on hard times and goes to work as a mob debt collector but finds there is more to this job than meets the eye especially when he encounters a villainous underworld kingpin (Tony Todd). Starts to grow mechanical and routine after a while but is held together by Adkins’ charisma and some snappy action and fight scenes. No great shakes but good of its kind and better than most direct-to-Redbox junk.