TV tonight: Belfast’s brilliant cop show is back on the beat

Northern Irish police drama Blue Lights returns for season three. Plus, Prof Jim Al-Khalili gets inside our heads in a Horizon two-parter on the human brain. Here’s what to watch this evening9pm, BBC One
Love is in the air as we rejoin Belfast’s peelers for a third season of the award-winning cop drama. Grace (Siân Brooke) and Stevie (Martin McCann) may be happily sharing cupcakes and house hunting on their shift (hurrah!), while Shane (Frank Blake) has now earned the team&rsqu