"The Bachelor" 8 p.m. ABC (18th season debut) — Juan Pablo Galavis is the first Latino bachelor.
"Hostages" 9 p.m. CBS (first season finale) — Duncan discovers Sandrine's betrayal.
"Cake Boss" 9 p.m. TLC — A Cinco de Mayo cake is made for a local mariachi band's fiesta.
"Major Crimes" 9 p.m. TNT — The squad races to stop a serial killer before he strikes again.
"Single Ladies" 9 p.m. VH1 (third season debut) — After a 16-month hiatus, the Atlanta single ladies reunite for a wedding.
"Castle" 10 p.m. ABC — Castle and Beckett hunt down a serial arsonist while Jenny goes into labor.
