TV highlights: 'America's Next Top Model' returns for its 21st season

Two new bachelorettes arrive and cause romantic complications, Chris B. sustains a serious injury and two contestants unexpectedly leave paradise for good on "Bachelor in Paradise" (ABC at 8 p.m.). "Running Wild With Bear Grylls" (NBC at 8) hosts Tom Arnold this week, with wild man Grylls taking the "True Lies" actor and comedian to Oregon's unpredictable coastal mountains.