Because you like Martha Jones in Doctor Who

Ianto Jones' withdrawn nature conceals his emotional pain. See them in Torchwood.

There's more to this sweet, caring landlady than meets the eye. See them in Sherlock.

Xander Harris' life motto: laugh in the face of danger and then hide until it goes away. See them in Buffy the Vampire Slayer.

Detective Alec Hardy doesn't let anyone get too close to him. See them in Broadchurch.

On the outside, Gwen seems meek and calm. But she has an inner core of steel. See them in Merlin.

Born into luxury, Sybil Crawley wants to find real purpose and meaning in her privileged life. See them in Downton Abbey.

A formerly righteous wizard, Saruman has been corrupted by the forces of evil. See them in The Lord of the Rings.

Greg Lestrade is gruff, loyal, and quietly competent. See them in Sherlock.

Joe West is overprotective and secretive when his children are involved. See them in DC Extended Universe.

Merry Brandybuck is a troublemaking hobbit with a brave streak that some might call foolhardy. See them in The Lord of the Rings.

James Gordon happens to be the one guy in Gotham City with proper morals who doesn't also run around in a cape. See them in DC Extended Universe.

Part archaeologist, part philosopher, part politician, Jean-Luc Picard is an unashamed intellectual who runs a tight ship. See them in Star Trek: The Next Generation.