There’s a fresh candidate in the running for worst movie of 2007 honors. “I Know Who Killed Me,” a ridiculous thriller (minus the thrills) starring the embattled Lindsay Lohan in a dual role, has all the hallmarks necessary for qualification: A nonsensical plot that grows sillier by the second, tawdry special effects, heavy-handed symbolism that’s big on electric-blue hues and mechanical performances are all culprits as far as the title’s concerned.

We’ll probably never know whether Lohan’s most recent difficulties ...