PSYCH (Global, 8 p.m. ET/PT) Hailing from the USA Network, this comedy-drama lacks the sophistication of cable fare like Mad Men, but it’s never dull. The premise stars James Roday as Shawn Spencer, a charmer who has the Santa Barbara police believing he has eerie psychic abilities capable of solving crimes (he’s not psychic, but solves crimes anyway). Shawn’s reluctant partner is his best pal Gus, played by Dule Hill, formerly of The West Wing. Currently in its sixth season, the concept is known for tongue-in-cheek storylines and breakneck dialogue, as in tonight’s show, in which the pair investigate the murder of a man drained of every drop of blood in his body. To bump up the kitsch quotient, the episode guest-stars Kristy Swanson, best known as the original Buffy the Vampire Slayer.