Critic's corner

“Zen’’ continues with Rufus Sewell as the Venetian detective. In tonight’s case, about a dead aristocrat: Did he jump or was he pushed?

The Marriage Ref 10 p.m., Channel 7

Lauren Graham, Colin Quinn, and Mary J. Blige deliver their opinions about a husband who has trouble with his wife’s love of accent pillows.

Big Brother 13 8 p.m., Channel 4

Nominations for eviction.

Comic Con ’11 Live Tomorrow at 4 p.m., G4

In San Diego with hosts Kevin Pereira and Candace Bailey.

Drop Dead Diva 9 p.m., Lifetime

Jane represents a lesbian couple.

True Blood 9 p.m., HBO

Lafayette goes to Mexico.

Leverage 9 p.m., TNT

A million-dollar potato.