How I Met Your Mother (7 p.m., Ch. 2): Marshall becomes obsessed with saving the environment.
Chuck (7 p.m., Ch. 5): The team is sent to England to protect a reclusive heiress
The Cape (8 p.m., Ch. 5): The Cape needs help finding The Lich.
The Chicago Code (8 p.m., Ch. 13): A bank robber turns up dead.
Hawaii Five-0 (9 p.m., Ch. 2): Danny's fun-loving brother visits.
Castle (9 p.m., Ch. 4): Castle investigates an apparent robbery/homicide.
Harry's Law (9 p.m., Ch. 5): Malcolm and Harry try to mediate a gang war.