What to Watch on Wednesday: On PBS, everything from orphaned otters to Putin

Nature (8 p.m., UNC-TV) – Wildlife filmmaker Charlie Hamilton James captures the behavior of three river otter orphans in Wisconsin.

Speechless (8:30 p.m., ABC) – Kenneth can’t decide which era of Michael Jackson he wants to emulate for Halloween.

Chicago PD (10 p.m., NBC) – A meth lab bust uncovers a scam in which children adopted from foreign countries are abandoned and sold online.

Mr. Robot (10 p.m., USA) – The former interim CTO of E Corp returns.

Frontline: Putin’s Revenge (Part 1) – (10 p.m., UNC-TV) - The first part of the inside story of Russian President Vladimir Putin’s conflict with the U.S., including his grievances and efforts to exact revenge.