Lorelei, a villain from Asgard, makes trouble for Marvel's Agents of S.H.I.E.L.D. (7 p.m., ABC/Ch. 4).
They get some help from Lady Sif (Jaimie Alexander), who cross over from the "Thor" movies.
In Las Vegas, both BYU teams are playing for West Coast Conference basketball championships. And it's BYU-Gonzaga doubleheader.
First up, the Cougars face the Bulldogs for the women's tournament title at 2 p.m. on ESPNU.
Then it's BYU vs. Gonzaga for the men's tournament titled at 7 p.m. on ESPN.
Elsewhere on TV ...
The Voice (7 p.m., NBC/Ch. 5): The blind auditions continue.
Glee (7 p.m., Fox/Ch. 13): The glee club travels to Los Angeles for nationals.