Aurelie Kyinn

Taylor's horsing around causes a major rift between Seth and Summer; Marissa vows to do whatever it takes to watch out for Ryan; Sandy's partner goes above and beyond the call of duty.

While Marissa does all she can to get to know her sister, Kaitlin just stirs up trouble for the gang as she prepares to celebrate her birthday.

Taylor hits a high at the prom; Summer falls flat with her surprising prom date; Marissa convinces Volchok to attend the dance; the students elect one of the girls prom queen.