Here are two freebie, outdoor performances coming up this weekend worth every penny. We’re talking Captain Kirk and Madonna. Outside. Free. UPDATE: Blame my planning ahead mode. As pointed out in comments, Madonna movie is NEXT Friday.

First, the third in Three Dollar Bill Cinema’s outdoor film series in Cal Anderson park features the Madonna star vehicle, Desperately Seeking Susan. CHS is a happy co-sponsor. Movie starts when it gets dark so plan for 9ish. A Madonna look-alike contest will keep you entertained before the show.

Another star vehicle of sorts will make sci-fi geeks very, very happy this weekend as Hello Earth Productions presents Outdoor Trek:

Captain Kirk is the new Hamlet in Hello Earth’s Outdoor Trek. Outdoor Trek: “The Naked Time” is a live, free performance, dramatizing an episode featuring the original crack crew of the Starship Enterprise.

Saturday at 7 PM and Sunday at 2 PM in Central District’s Dr. Blanche Lavizzo Park at 2100 S Jackson St.

For bonus park freebies, check out Thursday night’s Volunteer Park Conservatory community luau and Saturday’s Team USA vs. Team Brasil benefit match-up for Bahiastreet.org.